Difference between revisions of "Applications-of-GeoGebra/C2/Roots-of-Polynomials/English"

Latest revision as of 17:03, 28 June 2018

Visual Cue	Narration
Slide Number 1 Title Slide	Welcome to this tutorial on Roots of Polynomials.
Slide Number 2 Learning Objectives	In this tutorial, we will learn: To plot graphs of polynomial equations About complex numbers, real and imaginary roots To find extrema and inflection points
Slide Number 3 Pre-requisites www.spoken-tutorial.org	To follow this tutorial, you should be familiar with GeoGebra interface Basics of coordinate system Polynomials If not, for relevant tutorials, please visit our website.
Slide Number 4 System Requirement	Here I am using: Ubuntu Linux operating system version 14.04 GeoGebra 5.0.388.0-d
	Let us begin with the binomial theorem.
Slide Number 5 Binomial Theorem Binomial theorem states that if a, b Єℝ, index n is a positive integer, 0 ≤ r ≤n, then (a + b)ⁿ = ⁿC₀ aⁿ + ⁿC₁ a^n-1b¹ + ⁿC₂ a^n-2b² + … + ⁿC_r a^n-rb^r + … + ⁿC_n bⁿ Reminder: ⁿC₁ = n!/[1! (n-1)!]	a and b are real numbers. index n is a positive integer. r lies between 0 and n. Binomial theorem states that a plus b raised to n can be expanded as shown.
Slide Number 6 Quadratic Equations and Roots A second degree polynomial, y = a x²+ b x+ c has roots x=- b ± sqrt{( b ²-4 ac)/2a } where ▲= b²-4ac When ▲< 0, roots are complex When ▲=0, roots are real and equal When ▲>0, roots are real and unequal	Quadratic Equations and Roots A 2^nd degree polynomial, y equals a x squared plus b x plus c has roots given by values of x. x is equal to ratio of minus b plus or minus squareroot of b squared minus 4 a c to 2 a. Where discriminant Delta is equal to b squared minus 4 a c When Delta is less than 0, roots are complex When Delta is equal to 0, roots are real and equal When Delta is greater than 0, roots are real and unequal
Slide Number 7 Quadratic Equations and Roots When roots are real, ax²+b x+ c =0 has extremum (x_v, y_v) x_v = - b/2a and y_v= a x_v²+ b x_v+ c	When roots are real, ax squared plus b x plus c equals 0 has extremum xv comma yv xv equals minus b divided by 2 a and yv equals axv squared plus bxv plus c
Show the GeoGebra window.	I have already opened the GeoGebra interface.
Click on View >> select CAS.	Click on View tool and select CAS to open the CAS view.
In line 1 in CAS view, type f(x):=x^2-2x-3 >> press Enter.	In line 1 in CAS view, type the following line. f x in parentheses colon equals x caret 2 minus 2 space x minus 3. To type caret symbol, hold Shift key down and press 6. The space indicates multiplication. Press Enter.
Drag boundary of Algebra view.	Drag boundary to see Algebra view properly.
Point to the equation f(x) appearing in Algebra view. Point to exponent 2 in f(x).	Observe the equation f of x in Algebra view. The degree of this quadratic polynomial f of x is 2.
Drag boundary of CAS view.	Drag boundary to see Graphics view properly.
Click in Graphics view to see Graphics View toolbar.	Click in Graphics view to see Graphics View toolbar.
Move Graphics View>> click on Zoom Out	Under Move Graphics View, click on Zoom Out tool.
Click in Graphics view >> minimum vertex of parabola f.	Click in Graphics view to see the minimum vertex of parabola f.
Click on Move Graphics View tool >> click in Graphics background.	Click on Move Graphics View tool and click in Graphics background.
Hand symbol appears >> drag Graphics view to see parabola f.	When hand symbol appears, drag Graphics view, so you can see parabola f.
Drag boundaries of CAS view.	Drag boundaries to see CAS view properly.
Type Root(f) in line 2 of CAS view >> press Enter.	In line 2 of CAS view, type Root f in parentheses. Press Enter.
Point to roots in CAS view.	The roots appear below, in the same box, in curly brackets.
Point to roots in Graphics view.	Note that these are the x-intercepts of parabola f in Graphics view.
Type Extremum(f) in line 3 of CAS view >> press Enter.	In line 3 of CAS view, type Extremum f in parentheses. Press Enter.
Point to extremum in CAS view.	The extremum appears below, in the same box, in curly brackets.
Point to minimum vertex of parabola f in Graphics view.	Note that this is the minimum vertex of parabola f in Graphics view.
In line 4 in CAS view, type g(x):=x^2+5x+10 >> press Enter.	In line 4 in CAS view, type the following line. g x in parentheses colon equals x caret 2 plus 5 space x plus 10. Press Enter.
Drag boundary of Algebra View. Point to the equation g(x) appearing in Algebra view.	Drag boundary to see Algebra view properly. Observe the equation g of x in Algebra view.
Drag boundary of CAS view.	Drag boundary to see Graphics view properly.
Uncheck f of x in CAS view. Point to Algebra view >> hides parabola f in Graphics view.	Uncheck f of x in CAS view. Note that this also unchecks it in Algebra view and hides parabola f in Graphics view.
Click >> drag Graphics view to see parabola g.	Click in and drag Graphics view so you can see parabola g.
Drag boundary of CAS view.	Again, drag boundary to see CAS view properly.
Type Root(g) in line 5 of CAS view >> press Enter.	In line 5 of CAS view, type Root g in parentheses. Press Enter.
Point to empty curly brackets for roots in CAS view.	Empty curly brackets appear below. Parabola g does not have any real roots as it does not intersect x axis at all. Roots are said to be complex.
Type Extremum(g) in line 6 of CAS view >> press Enter.	In line 6 of CAS view, type Extremum g in parentheses. Press Enter.
Point to extremum in CAS view.	The extremum appears below, in the same box, in curly brackets.
Point to the minimum vertex of parabola g in Graphics view.	Note that this is the minimum vertex of parabola g in Graphics view.
Point to Evaluate tool. Point to extremum in form of fractions.	While Evaluate tool is highlighted in CAS View toolbar, the extremum appears as fractions. Minus 5 divided by 2 comma 15 divided by 4.
Click on the extremum in line 6 and click on Numeric tool. Point to extremum in form of decimals.	In line 6, click on the extremum and click on Numeric tool. The extremum now appears in decimal form. Minus 2 point 5 comma 3 point 7 5.
	Let us look at complex numbers.
Slide Number 8 Complex numbers, XY plane A complex number is expressed as z = a + bi: where 'a' = real part, bi = imaginary part, and a and b are constants. Imaginary number, i = sqrt{-1} In the XY plane, a + bi is point (a, b). In the complex plane, x axis = real axis, y axis = imaginary axis.	Complex numbers, XY plane A complex number is expressed as z equals a plus bi. a is the real part; bi is imaginary part;a and b are constants i is imaginary number and is equal to square root of minus 1. In the XY plane, a plus bi corresponds to the point a comma b. In the complex plane, x axis is called real axis, y axis is called imaginary axis.
Slide Number 9 Complex numbers, complex plane In complex plane, z is a vector with real axis coordinate a and imaginary axis coordinate b Length of the vector z = \|z\| = r r = sqrt (a²+b²) (Pythagoras’ theorem)	Complex numbers, complex plane In complex plane, z is a vector. Its real axis coordinate is a and imaginary axis coordinate is b. The length of the vector z is equal to the absolute value of z and to r. According to Pythagoras’ theorem, r is equal to squareroot of a squared plus b squared.
Show the GeoGebra window.	Let us go back to the GeoGebra interface we were working on. We will now use the input bar instead of CAS view.
Click >> close CAS view.	Click and close CAS view.
In Algebra view, uncheck g of x to hide.	In Algebra view, uncheck g of x to hide it.
In input bar, type h(x):=x^3-4x^2+x+6 >> press Enter.	In input bar, type the following line. h x in parentheses colon equals x caret 3 minus 4 space x caret 2 plus x plus 6. Press Enter.
Drag boundaries of Algebra >> Graphics view. Point to the equation h(x) appearing in Algebra view.	Drag boundaries to see Algebra and Graphics views properly. Observe equation h of x in Algebra view. Function h of x is graphed in Graphics view.
Under Move Graphics View>> click on Zoom Out tool. Click in Graphics view.	Under Move Graphics View, click on Zoom Out tool. Click in Graphics view.
Click on Move Graphics View >> move Graphics background to see graph.	Click on Move Graphics View and move Graphics background to see the graph.
In input bar, type Root(h) >> press Enter.	In input bar, type Root h in parentheses and press Enter.
Point to co-ordinates of three roots (A, B and C) in Algebra view.	The co-ordinates of three roots (A, B and C) appear in Algebra view.
Point to three roots mapped on the curve h of x in Graphics view.	The three roots are also mapped as x intercepts of the curve h of x in Graphics view.
In input bar, type Extremum h in parentheses >> press Enter.	In input bar, type Extremum h in parentheses and press Enter.
Point to co-ordinates of two extrema (Dand E) in Algebra view.	Co-ordinates of two extrema (D and E) appear in Algebra view.
Point to two extrema mapped on the curve h of x in Graphics view.	The two extrema are also mapped on curve h of x in Graphics view.
Slide Number 10 Point of inflection Point of inflection (PoI) on a curve is the point where curve changes direction. To find co-ordinates of PoI (x,y), we equate 2nd derivative of given function to 0 Solve to get x (x co-ordinate of PoI) Substitute this x in original function to get y co-ordinate	Point of inflection A point of inflection PoI on a curve is the point where the curve changes its direction. To find the co-ordinates of PoI x comma y, We equate second derivative of the given function to 0. Solution of this equation gives us x (x co-ordinate of PoI). Substitute this x in original function to get y co-ordinate.
Let us find the point of inflection on h(x).	Let us find the point of inflection on h of x.
In input bar, type Inf >> choose InflectionPoint ( <Polynomial> ) option from menu.	In input bar, type Inf and scroll down menu to choose InflectionPoint Polynomial option.
Instead of highlighted Polynomial, type h >> Press Enter.	Instead of highlighted Polynomial, type h and press Enter.
Point to the point of inflection in Algebra view.	In Algebra view, point of inflection appears as point F, below the two extrema.
Point to F on h(x) in Graphics view.	F is mapped on h of x in Graphics view.
point to the function.	Correlate the degree of the polynomials and the number of roots seen so far.
Point to CAS>> Algebra >> Graphics views.	Observe that functions entered in CAS appear in Algebra and Graphics views.
Point to Algebra >> Graphics views >> CAS view.	Functions entered in input bar appear in Algebra and Graphics views but not in CAS view.
	Let us summarize.
Slide Number 11 Summary	In this tutorial, we have learnt to: Plot graphs of polynomial functions using CAS view and input bar Find real roots, extrema and inflection point(s) Complex roots will be covered in another tutorial
Slide Number 12 Assignment d(x)=x²-6x+5 e(x)=3x³-2x²+0.2x-1 f(x)=-2x⁴-x³+3x² g(x)=x⁵-7x⁴+9x³+23x²-50x+24 h(x)=(4x+3)/(x-1) i(x)=(3x²-2x-1)/(2x²+3x-2)	Assignment: Plot graphs and find roots, extrema and inflection points for the following polynomials.
Slide Number 13 About Spoken Tutorial project	The video at the following link summarizes the Spoken Tutorial project. Please download and watch it.
Slide Number 14 Spoken Tutorial workshops	The Spoken Tutorial Project team conducts workshops and gives certificates. For more details, please write to us.
Slide Number 15 Forum for specific questions: Do you have questions in THIS Spoken Tutorial? Please visit this site. Choose the minute and second where you have the question. Explain your question briefly. Someone from our team will answer them.	Please post your timed queries on this forum.
Slide Number 16 Acknowledgement	Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India. More information on this mission is available at this link.
	This is Vidhya Iyer from IIT Bombay, signing off. Thank you for joining.

Contributors and Content Editors

Madhurig, Nancyvarkey, Vidhya

Difference between revisions of "Applications-of-GeoGebra/C2/Roots-of-Polynomials/English"

Latest revision as of 17:03, 28 June 2018

Contributors and Content Editors

Navigation menu

Personal tools

Namespaces

Variants

Views

Actions

Search

Navigation

Tools

@@ Line 4: / Line 4: @@
 |-
-|  | '''Slide Number 1'''
+|| '''Slide Number 1'''
 '''Title Slide'''
-|  | Welcome to this tutorial on '''Roots of Polynomials'''.
+|| Welcome to this tutorial on '''Roots of Polynomials'''.
 |-
-|  | '''Slide Number 2'''
+|| '''Slide Number 2'''
 '''Learning Objectives'''
-|  | In this tutorial, we will learn:
+|| In this tutorial, we will learn:
-To plot graphs of '''polynomial''' equations
+* To plot graphs of '''polynomial''' equations
-About '''complex numbers''', '''real''' and '''imaginary roots'''
+* About '''complex numbers''', '''real''' and '''imaginary roots'''
-To find '''extrema''' and '''inflection points'''
+* To find '''extrema''' and '''inflection points'''
 |-
-|  | '''Slide Number 3'''
+|| '''Slide Number 3'''
 '''Pre-requisites'''
 '''www.spoken-tutorial.org'''
-|  | To follow this tutorial, you should be familiar with '''GeoGebra''' interface
+|| To follow this tutorial, you should be familiar with
+* '''GeoGebra''' interface
-Basics of '''coordinate system'''
+* Basics of '''coordinate system'''
-'''Polynomials'''
+* '''Polynomials'''
-If not, for relevant tutorials, please visit our website.
+* If not, for relevant tutorials, please visit our website.
 |-
-|  | '''Slide Number 4'''
+|| '''Slide Number 4'''
 '''System Requirement'''
-|  | Here I am using:
+|| Here I am using:
-'''Ubuntu Linux''' OS version 14.04
+* '''Ubuntu Linux''' operating system version 14.04
-'''GeoGebra 5.0.388.0-d'''
+* '''GeoGebra 5.0.388.0-d'''
 |-
-|  |
+||
-|  | Let us begin with the '''binomial theorem'''.
+|| Let us begin with the '''binomial theorem'''.
 |-
-|  | '''Slide Number 5'''
+|| '''Slide Number 5'''
 '''Binomial Theorem'''
-'''Binomial theorem''' states that if ''a, b'' Єℝ, '''index''' ''n'' is a '''positive integer''', ''0 ≤ r ≤n, then (a + b)<sup>n</sup> can be expanded as follows:''
+'''Binomial theorem''' states that if ''a, b'' Єℝ, '''index''' ''n'' is a '''positive integer''',
-''(a + b)<sup>n</sup> <nowiki>= </nowiki><sup>n</sup>C<sub>0</sub> a<sup>n</sup> + <sup>n</sup>C<sub>1</sub> a<sup>n-1 </sup>b<sup>1</sup> + <sup>n</sup>C<sub>2</sub> a<sup>n-2 </sup>b<sup>2</sup> + … + <sup>n</sup>C<sub>r</sub> a<sup>n-r </sup>b<sup>r</sup> + … + <sup>n</sup>C<sub>n</sub> b<sup>n''</sup>
+* ''0 ≤ r ≤n'', then
+* ''(a + b)<sup>n</sup> <nowiki>= </nowiki><sup>n</sup>C<sub>0</sub> a<sup>n</sup> + <sup>n</sup>C<sub>1</sub> a<sup>n-1 </sup>b<sup>1</sup> + <sup>n</sup>C<sub>2</sub> a<sup>n-2 </sup>b<sup>2</sup> + … + <sup>n</sup>C<sub>r</sub> a<sup>n-r </sup>b<sup>r</sup> + … + <sup>n</sup>C<sub>n</sub> b<sup>n''</sup>
 Reminder: ''<sup>n</sup>C<sub>1</sub> = n!/[1! (n-1)!]''
-|  | '''''a''''' and '''''b''''' are '''real numbers''', '''index''' '''''n''''' is a positive integer.
+|| '''''a''''' and '''''b''''' are '''real numbers'''.
+'''index''' '''''n''''' is a positive integer.
 '''''r''''' lies between 0 and '''''n'''''.
@@ Line 58: / Line 64: @@
 '''Binomial theorem''' states that '''''a''''' plus '''''b''''' raised to '''''n''''' can be expanded as shown.
 |-
-|  | '''Slide Number 6'''
+|| '''Slide Number 6'''
 '''Quadratic Equations and Roots'''
-A second degree polynomial, '''y =''' '''''a''''' '''x<sup>2</sup>+''' '''''b''''' '''x+''' '''''c''''' has roots
+* A second degree polynomial, '''y =''' '''''a''''' '''x<sup>2</sup>+''' '''''b''''' '''x+''' '''''c''''' has roots
-'''x=-''' '''''b''''' '''± sqrt{(''' '''''b''''' '''<sup>2</sup>-4''' '''''ac)/2a''''' '''}'''
+* '''x=-''' '''''b''''' '''± sqrt{(''' '''''b''''' '''<sup>2</sup>-4''' '''''ac)/2a''''' '''}'''
+* where '''▲=''' '''''b<sup>2</sup>-4ac'''''
-where '''▲=''' '''''b<sup>2</sup>-4ac'''''
+* When ▲< 0, roots are complex
-When ▲< 0, roots are complex
+* When ▲=0, roots are real and equal
-When ▲=0, roots are real and equal
+* When ▲>0, roots are real and unequal
+|| '''Quadratic Equations and Roots'''
-When ▲>0, roots are real and unequal
-|  | '''Quadratic Equations and Roots'''
 A '''2<sup>nd</sup> degree polynomial''', '''y equals''' '''''a''''' '''x squared plus''' '''''b''''' '''x plus''' '''''c''''' has '''roots''' given by values of '''''x'''''.
@@ Line 79: / Line 85: @@
 '''''x''''' is equal to '''ratio''' of minus '''''b''''' plus or minus '''squareroot''' of '''''b''''' '''squared''' minus 4 '''''a c''''' to 2 '''''a'''''.
-Where '''determinant''' '''Delta''' is equal to '''''b''''' '''squared''' minus 4 '''''a c'''''
+Where '''discriminant''' '''Delta''' is equal to '''''b''''' '''squared''' minus 4 '''''a c'''''
 When '''Delta''' is less than 0, '''roots''' are '''complex'''
@@ Line 87: / Line 93: @@
 When '''Delta''' is greater than 0, '''roots''' are '''real''' and unequal
 |-
-|  | '''Slide Number 7'''
+|| '''Slide Number 7'''
 '''Quadratic Equations and Roots'''
-When roots are real, '''''ax<sup>2</sup>+b''''' '''x+''' '''''c''''' '''=0''' has extremum '''(x<sub>v</sub>, y<sub>v</sub>)'''
+* When roots are real, '''''ax<sup>2</sup>+b''''' '''x+''' '''''c''''' '''=0''' has extremum '''(x<sub>v</sub>, y<sub>v</sub>)'''
-'''x<sub>v</sub> = -''' '''''b/2a''''' and '''y<sub>v</sub>=''' '''''a''''' '''x<sub>v</sub><sup>2</sup>+''' '''''b''''' '''x<sub>v</sub>+''' '''''c'''''
+* '''x<sub>v</sub> = -''' '''''b/2a''''' and '''y<sub>v</sub>=''' '''''a''''' '''x<sub>v</sub><sup>2</sup>+''' '''''b''''' '''x<sub>v</sub>+''' '''''c'''''
-|  | '''Quadratic Equations and Roots'''
+||When '''roots''' are '''real''', '''''ax''''' '''squared plus''' '''''b x''''' '''plus''' '''''c''''' equals 0 has '''extremum''' '''''xv''''' '''comma''' '''''yv'''''
-When '''roots''' are '''real''', '''''ax''''' '''squared plus''' '''''b x''''' '''plus''' '''''c''''' equals 0 has '''extremum''' '''''xv''''' '''comma''' '''''yv'''''
 '''''xv''''' equals '''minus''' '''''b''''' '''divided by 2''' '''''a''''' and '''''yv''''' '''equals''' '''''axv''''' '''squared plus''' '''''bxv''''' '''plus''' '''''c'''''
 |-
-|  | Show the '''GeoGebra''' window.
+|| Show the '''GeoGebra''' window.
-|  | I have already opened the '''GeoGebra''' interface.
+|| I have already opened the '''GeoGebra''' interface.
 |-
-|  | Click on '''View''' >> select '''CAS'''.
+|| Click on '''View''' >> select '''CAS'''.
+|| Click on '''View''' tool and select '''CAS''' to open the '''CAS''' view.
-|  | Click on '''View''' tool and select '''CAS''' to open the '''CAS''' view.
 |-
-|  | In line 1 in '''CAS view''', type '''f(x):=x^2-2x-3''' >> press '''Enter'''.
+|| In line 1 in '''CAS view''', type '''f(x):=x^2-2x-3''' >> press '''Enter'''.
-|  | In line 1 in '''CAS''' view, type the following line.
+|| In line 1 in '''CAS''' view, type the following line.
 '''f x''' in parentheses '''colon equals x caret 2 minus 2 space x minus 3'''.
@@ Line 118: / Line 121: @@
 Press '''Enter'''.
 |-
-|  | Drag boundary to see '''Algebra''' view properly.
+|| Drag boundary of '''Algebra''' view.
-|  | Drag boundary to see '''Algebra''' view properly.
+|| Drag boundary to see '''Algebra''' view properly.
 |-
-|  | Point to the '''equation f(x)''' appearing in '''Algebra''' view.
+|| Point to the '''equation f(x)''' appearing in '''Algebra''' view.
 Point to '''exponent''' 2 in '''f(x)'''.
-|  | Observe the '''equation f of x''' in '''Algebra''' view.
+|| Observe the '''equation f of x''' in '''Algebra''' view.
 The '''degree''' of this '''quadratic polynomial f of x''' is 2.
 |-
-|  | Drag boundary to see '''Graphics''' view properly.
+|| Drag boundary of CAS view.
-|  | Drag boundary to see '''Graphics''' view properly.
+|| Drag boundary to see '''Graphics''' view properly.
 |-
-|  | Click in '''Graphics''' view to see '''Graphics View''' toolbar.
+||Click in '''Graphics''' view to see '''Graphics View''' toolbar.
-|  | Click in '''Graphics''' view to see '''Graphics View''' toolbar.
+|| Click in '''Graphics''' view to see '''Graphics View''' toolbar.
 |-
-|  | Under '''Move Graphics View''', click on '''Zoom Out''' tool.
+|| '''Move Graphics View'''>> click on '''Zoom Out'''
+|| Under '''Move Graphics View''', click on '''Zoom Out''' tool.
+|-
+||Click in '''Graphics''' view >> minimum '''vertex''' of '''parabola f'''.
-Click in '''Graphics''' view to see the minimum '''vertex''' of '''parabola f'''.
+||Click in '''Graphics''' view to see the minimum '''vertex''' of '''parabola f'''.
-|  | Under '''Move Graphics View''', click on '''Zoom Out''' tool.
-Click in '''Graphics''' view to see the minimum '''vertex''' of '''parabola f'''.
 |-
-|  | Click on '''Move Graphics View''' tool and click in '''Graphics''' background.
+|| Click on '''Move Graphics View''' tool >> click in '''Graphics''' background.
+|| Click on '''Move Graphics View''' tool and click in '''Graphics''' background.
-When hand symbol appears, drag '''Graphics''' view so you can see parabola '''f'''.
+|-
-|  | Click on '''Move Graphics View''' tool and click in '''Graphics''' background.
+||Hand symbol appears >> drag '''Graphics''' view to see parabola '''f'''.
+||When hand symbol appears, drag '''Graphics''' view, so you can see parabola '''f'''.
-When hand symbol appears, drag '''Graphics''' view so you can see parabola '''f'''.
 |-
-|  | Drag boundaries to see '''CAS''' view properly.
+|| Drag boundaries of CAS view.
-|  | Drag boundaries to see '''CAS''' view properly.
+|| Drag boundaries to see '''CAS''' view properly.
 |-
-|  | Type '''Root(f)''' in line 2 of '''CAS''' view >> press '''Enter'''.
+|| Type '''Root(f)''' in line 2 of '''CAS''' view >> press '''Enter'''.
-|  | In line 2 of '''CAS''' view, type '''Root f''' in parentheses.
+|| In line 2 of '''CAS''' view, type '''Root f''' in parentheses.
 Press '''Enter'''.
 |-
-|  | Point to '''roots''' in '''CAS''' view.
+|| Point to '''roots''' in '''CAS''' view.
-|  | The '''roots''' appear below, in the same box, in curly brackets.
+|| The '''roots''' appear below, in the same box, in curly brackets.
 |-
-|  | Point to '''roots''' in '''Graphics''' view.
+|| Point to '''roots''' in '''Graphics''' view.
-|  | Note that these are the '''x-intercepts''' of parabola '''f''' in '''Graphics''' view.
+|| Note that these are the '''x-intercepts''' of parabola '''f''' in '''Graphics''' view.
 |-
-|  | Type '''Extremum(f)''' in line 3 of '''CAS''' view >> press '''Enter'''.
+|| Type '''Extremum(f)''' in line 3 of '''CAS''' view >> press '''Enter'''.
-|  | In line 3 of '''CAS''' view, type '''Extremum f''' in parentheses.
+|| In line 3 of '''CAS''' view, type '''Extremum f''' in parentheses.
 Press '''Enter'''.
 |-
-|  | Point to '''extremum''' in '''CAS''' view.
+|| Point to '''extremum''' in '''CAS''' view.
-|  | The '''extremum''' appears below, in the same box, in curly brackets.
+|| The '''extremum''' appears below, in the same box, in curly brackets.
 |-
-|  | Note that this is the minimum '''vertex''' of parabola '''f''' in '''Graphics''' view.
+||Point to minimum '''vertex''' of parabola '''f''' in '''Graphics''' view.
-|  | Note that this is the minimum '''vertex''' of parabola '''f''' in '''Graphics''' view.
+|| Note that this is the minimum '''vertex''' of parabola '''f''' in '''Graphics''' view.
 |-
-|  | In line 4 in '''CAS''' view, type '''g(x):=x^2+5x+10''' >> press '''Enter'''.
+|| In line 4 in '''CAS''' view, type '''g(x):=x^2+5x+10''' >> press '''Enter'''.
-|  | In line 4 in '''CAS''' view, type the following line.
+|| In line 4 in '''CAS''' view, type the following line.
 '''g x''' in parentheses '''colon equals x caret 2 plus 5 space x plus 10'''.
@@ Line 180: / Line 182: @@
 Press '''Enter'''.
 |-
-|  | Drag boundary to see '''Algebra''' view properly.
+|| Drag boundary of '''Algebra View'''.
 Point to the '''equation g(x)''' appearing in '''Algebra''' view.
-|  | Drag boundary to see '''Algebra''' view properly.
+|| Drag boundary to see '''Algebra''' view properly.
 Observe the '''equation g of x''' in '''Algebra''' view.
 |-
-|  | Drag boundary to see '''Graphics''' view properly.
+|| Drag boundary of '''CAS''' view.
-|  | Drag boundary to see '''Graphics''' view properly.
+|| Drag boundary to see '''Graphics''' view properly.
 |-
-|  | Uncheck '''f of x''' in '''CAS''' view.
+|| Uncheck '''f of x''' in '''CAS''' view.
-Note that this also unchecks it in '''Algebra''' view and hides parabola '''f''' in '''Graphics''' view.
+Point to '''Algebra''' view >> hides parabola '''f''' in '''Graphics''' view.
-|  | Uncheck '''f of x''' in '''CAS''' view.
+|| Uncheck '''f of x''' in '''CAS''' view.
 Note that this also unchecks it in '''Algebra''' view and hides parabola '''f''' in '''Graphics''' view.
 |-
-|  | Click and drag '''Graphics''' view so you can see parabola '''g'''.
+|| Click >> drag '''Graphics''' view to see parabola '''g'''.
-|  | Click in and drag '''Graphics''' view so you can see parabola '''g'''.
+|| Click in and drag '''Graphics''' view so you can see parabola '''g'''.
 |-
-|  | Again, drag boundary to see '''CAS''' view properly.
+|| Drag boundary of '''CAS''' view.
-|  | Again, drag boundary to see '''CAS''' view properly.
+|| Again, drag boundary to see '''CAS''' view properly.
 |-
-|  | Type '''Root(g)''' in line 5 of '''CAS''' view >> press '''Enter'''.
+|| Type '''Root(g)''' in line 5 of '''CAS''' view >> press '''Enter'''.
-|  | In line 5 of '''CAS''' view, type '''Root g''' in parentheses.
+|| In line 5 of '''CAS''' view, type '''Root g''' in parentheses.
 Press '''Enter'''.
 |-
-|  | Point to empty curly brackets for '''roots''' in '''CAS''' view.
+|| Point to empty curly brackets for '''roots''' in '''CAS''' view.
-|  | Empty curly brackets appear below.
+|| Empty curly brackets appear below.
 Parabola '''g''' does not have any '''real roots''' as it does not intersect '''x axis''' at all.
@@ Line 215: / Line 217: @@
 '''Roots''' are said to be '''complex'''.
 |-
-|  | Type '''Extremum(g)''' in line 6 of '''CAS '''view >> press '''Enter'''.
+|| Type '''Extremum(g)''' in line 6 of '''CAS '''view >> press '''Enter'''.
-|  | In line 6 of '''CAS''' view, type '''Extremum g''' in parentheses.
+|| In line 6 of '''CAS''' view, type '''Extremum g''' in parentheses.
 Press '''Enter'''.
 |-
-|  | Point to '''extremum''' in '''CAS''' view.
+|| Point to '''extremum''' in '''CAS''' view.
-|  | The '''extremum''' appears below, in the same box, in curly brackets.
+|| The '''extremum''' appears below, in the same box, in curly brackets.
 |-
-|  | Note that this is the minimum '''vertex''' of parabola '''g''' in '''Graphics''' view.
+|| Point to the minimum '''vertex''' of parabola '''g''' in '''Graphics''' view.
-|  | Note that this is the minimum '''vertex''' of parabola '''g''' in '''Graphics''' view.
+|| Note that this is the minimum '''vertex''' of parabola '''g''' in '''Graphics''' view.
 |-
-|  | Point to '''Evaluate''' tool.
+|| Point to '''Evaluate''' tool.
 Point to '''extremum''' in form of '''fractions'''.
-|  | While '''Evaluate''' tool is highlighted in '''CAS View''' toolbar, the '''extremum''' appears as '''fractions'''.
+|| While '''Evaluate''' tool is highlighted in '''CAS View''' toolbar, the '''extremum''' appears as '''fractions'''.
-'''Minus five divided by 2 comma 15 divided by 4'''.
+'''Minus 5 divided by 2 comma 15 divided by 4'''.
 |-
-|  | Click on the '''extremum''' in line 6 and click on '''Numeric''' tool.
+|| Click on the '''extremum''' in line 6 and click on '''Numeric''' tool.
 Point to '''extremum''' in form of '''decimals'''.
-|  | In line 6, click on the '''extremum''' and click on '''Numeric''' tool.
+|| In line 6, click on the '''extremum''' and click on '''Numeric''' tool.
 The '''extremum '''now appears in '''decimal''' form.
@@ Line 242: / Line 244: @@
 '''Minus 2 point 5 comma 3 point 7 5'''.
 |-
-|  |
+||
-|  | Let us look at '''complex numbers'''.
+|| Let us look at '''complex numbers'''.
 |-
-|  | '''Slide Number 8'''
+|| '''Slide Number 8'''
 '''Complex numbers, XY plane'''
-As we know,
-A '''complex number''' is expressed as '''''z = a + ib''''': where ''''''a'''''' is the real part, ‘'''''bi’''''' is '''imaginary '''part, and '''a''' and '''b''' are constants.
-'''Imaginary number, ''i'' '''= sqrt{-1}
+* A '''complex number''' is expressed as '''''z = a + bi''''': where ''''''a'''''' = real part, '''''bi''''' = '''imaginary '''part, and '''a''' and '''b''' are constants.
-In the '''XY plane''', '''''a + ib''''' corresponds to the point ('''a, b''').
+* '''Imaginary number, ''i'' '''= sqrt{-1}
-In the '''complex plane''', '''x axis''' is called '''real axis''', '''y axis''' is called '''imaginary axis'''.
+* In the '''XY plane''', '''''a + bi''''' is point ('''a, b''').
-|  | '''Complex numbers, XY plane'''
+* In the '''complex plane''', '''x axis''' = '''real axis''', '''y axis''' = '''imaginary axis'''.
+|| '''Complex numbers, XY plane'''
+A '''complex number''' is expressed as '''''z''''' '''equals''' '''''a''''' '''plus''' '''''bi'''''.
-As we know,
-A '''complex number''' is expressed as '''''z''''' '''equals''' '''''a''''' '''plus''' '''''ib'''''.
 '''''a''''' is the '''real''' part; '''''bi''''' is '''imaginary '''part;'''''a''''' and '''''b''''' are '''constants'''
 '''''i''''' is '''imaginary number''' and is equal to '''square root of minus 1'''.
-In the '''XY plane''', '''''a''''' '''plus''' '''''ib''''' corresponds to the point '''''a''''' '''comma''' '''''b'''''.
+In the '''XY plane''', '''''a''''' '''plus''' '''''bi''''' corresponds to the point '''''a''''' '''comma''' '''''b'''''.
 In the '''complex plane''', '''x axis''' is called '''real axis, y axis''' is called '''imaginary axis'''.
 |-
-|  | '''Slide Number 9'''
+|| '''Slide Number 9'''
 '''Complex numbers, complex plane'''
-In '''complex plane''', '''''z''''' is a '''vector''' with '''real axis coordinate''' '''''a''''' and '''imaginary axis coordinate''' '''''b'''''
+* In '''complex plane''', '''''z''''' is a '''vector''' with '''real axis coordinate''' '''''a''''' and '''imaginary axis coordinate''' '''''b'''''
-Length of the '''vector''' '''''z''''' = |'''''z'''''| = '''''r'''''
-'''''r''''' '''= sqrt (a<sup>2</sup>+b<sup>2</sup>) (Pythagoras’ theorem)'''
+* Length of the '''vector''' '''''z''''' = |'''''z'''''| = '''''r'''''
-|  | '''Complex numbers, complex plane'''
-In '''complex plane''', '''''z''''' is a '''vector'''.
-Its '''real axis coordinate''' is '''''a''''' and '''imaginary axis coordinate''' is '''''b'''''.
+* '''''r''''' '''= sqrt (a<sup>2</sup>+b<sup>2</sup>) (Pythagoras’ theorem)'''
+|| '''Complex numbers, complex plane'''
-The length of the '''vector''' '''''z''''' is equal to the '''absolute value''' of '''''z''''' and to '''''r'''''.
+In '''complex plane''', '''''z''''' is a '''vector'''.
-According to '''Pythagoras’ theorem''', '''''r''''' is equal to '''squareroot of''' '''''a''''' '''squared plus''' '''''b''''' '''squared'''.
-|-
-|  | '''Slide Number 10'''
-'''Complex numbers, complex plane'''
+Its '''real axis coordinate''' is '''''a''''' and '''imaginary axis coordinate''' is '''''b'''''.
-'''Argument '''''ϴ''''' '''= angle between '''real axis''' and '''line segment''' connecting '''''z''''' to O '''(0,0)''' in counter-clockwise direction
-'''Polar form''' of '''''z = a + ib''''' is
+The length of the '''vector''' '''''z''''' is equal to the '''absolute value''' of '''''z''''' and to '''''r'''''.
-'''''z = r (cosϴ + i sinϴ)'''''
-where '''''a= r cosϴ, b=r sinϴ'''''
+According to '''Pythagoras’ theorem''', '''''r''''' is equal to '''squareroot of''' '''''a''''' '''squared plus''' '''''b''''' '''squared'''.
-|  | '''Argument ''theta''''' is angle between '''real axis''' and line segment connecting '''''z''''' to '''origin'''.
-It is in counter-clockwise direction.
-'''Polar form''' of '''''z''''' equals '''''a''''' '''plus''' '''''ib''''' is
-'''''z''''' equals '''''r times cos theta plus i sin theta'''''
-where '''''a''''' is equal to '''''r cos theta''''' and '''''b is r sin theta'''''
 |-
-|  | Show the '''GeoGebra''' window.
+|| Show the '''GeoGebra''' window.
-|  | Let us go back to the '''GeoGebra interface''' we were working on.
+|| Let us go back to the '''GeoGebra interface''' we were working on.
 We will now use the '''input bar''' instead of '''CAS''' view.
 |-
-|  | Click and close '''CAS''' view.
+|| Click >> close '''CAS''' view.
-|  | Click and close '''CAS''' view.
+|| Click and close '''CAS''' view.
 |-
-|  | In '''Algebra''' view, uncheck '''g of x''' to hide it.
+|| In '''Algebra''' view, uncheck '''g of x''' to hide.
-|  | In '''Algebra''' view, uncheck '''g of x''' to hide it.
+|| In '''Algebra''' view, uncheck '''g of x''' to hide it.
 |-
-|  | In '''input bar''', type the following line.
+|| In '''input bar''', type
 '''h(x):=x^3-4x^2+x+6''' >> press '''Enter'''.
-|  | In '''input bar''', type the following line.
+|| In '''input bar''', type the following line.
 '''h x''' in parentheses '''colon equals x caret 3 minus 4 space x caret 2 plus x plus 6'''.
@@ Line 331: / Line 319: @@
 Press '''Enter'''.
 |-
-|  | Drag boundaries to see '''Algebra''' and '''Graphics''' view properly.
+|| Drag boundaries of '''Algebra''' >> '''Graphics''' view.
 Point to the '''equation h(x)''' appearing in '''Algebra''' view.
-|  | Drag boundaries to see '''Algebra''' and '''Graphics''' view properly.
+|| Drag boundaries to see '''Algebra''' and '''Graphics''' views properly.
 Observe equation '''h of x''' in '''Algebra''' view.
@@ Line 340: / Line 328: @@
 Function '''h of x''' is graphed in '''Graphics''' view.
 |-
-|  | Under '''Move Graphics View''', click on '''Zoom Out''' tool.
+|| Under '''Move Graphics View'''>> click on '''Zoom Out''' tool.
 Click in '''Graphics''' view.
-|  | Under '''Move Graphics View''', click on '''Zoom Out''' tool.
+|| Under '''Move Graphics View''', click on '''Zoom Out''' tool.
 Click in '''Graphics''' view.
 |-
-|  | Click on '''Move Graphics View''' and move background to see the graph.
+|| Click on '''Move Graphics View''' >> move '''Graphics''' background to see graph.
-|  | Click on '''Move Graphics View''' and move background to see the graph.
+|| Click on '''Move Graphics View''' and move '''Graphics''' background to see the graph.
 |-
-|  | In '''input bar''', type '''Root(h)''' and press '''Enter'''.
+|| In '''input bar''', type '''Root(h)''' >> press '''Enter'''.
-|  | In '''input bar''', type '''Root h''' in parentheses and press '''Enter'''.
+|| In '''input bar''', type '''Root h''' in parentheses and press '''Enter'''.
 |-
-|  | Point to '''co-ordinates''' of three '''roots''' ('''A, B''' and '''C''') in '''Algebra''' view.
+|| Point to '''co-ordinates''' of three '''roots''' ('''A, B''' and '''C''') in '''Algebra''' view.
-|  | The '''co-ordinates''' of three '''roots''' ('''A, B''' and '''C''') appear in '''Algebra''' view.
+|| The '''co-ordinates''' of three '''roots''' ('''A, B''' and '''C''') appear in '''Algebra''' view.
 |-
-|  | Point to three '''roots''' mapped on the '''curve h of x''' in '''Graphics''' view.
+|| Point to three '''roots''' mapped on the '''curve h of x''' in '''Graphics''' view.
-|  | The three '''roots''' are also mapped as '''x intercepts''' of the '''curve h of x''' in '''Graphics''' view.
+|| The three '''roots''' are also mapped as '''x intercepts''' of the '''curve h of x''' in '''Graphics''' view.
 |-
-|  | In '''input bar''', type '''Extremum h''' in parentheses and press '''Enter'''.
+|| In '''input bar''', type '''Extremum h''' in parentheses >> press '''Enter'''.
-|  | In '''input bar''', type '''Extremum h''' in parentheses and press '''Enter'''.
+|| In '''input bar''', type '''Extremum h''' in parentheses and press '''Enter'''.
 |-
-|  | Point to '''co-ordinates''' of two '''extrema''' ('''D'''and '''E''') in '''Algebra''' view.
+|| Point to '''co-ordinates''' of two '''extrema''' ('''D'''and '''E''') in '''Algebra''' view.
-|  | '''Co-ordinates''' of two '''extrema''' ('''D''' and '''E''') appear in '''Algebra''' view.
+|| '''Co-ordinates''' of two '''extrema''' ('''D''' and '''E''') appear in '''Algebra''' view.
 |-
-|  | Point to two '''extrema''' mapped on the '''curve h of x''' in '''Graphics''' view.
+|| Point to two '''extrema''' mapped on the '''curve h of x''' in '''Graphics''' view.
-|  | The two '''extrema''' are also mapped on '''curve h of x''' in '''Graphics''' view.
+|| The two '''extrema''' are also mapped on '''curve h of x''' in '''Graphics''' view.
 |-
-|  | '''Slide Number 11'''
+|| '''Slide Number 10'''
 '''Point of inflection'''
@@ Line 374: / Line 362: @@
 '''Point of inflection''' ('''PoI''') on a curve is the point where '''curve''' changes direction.
-To find co-ordinates of PoI (x,y)
+* To find '''co-ordinates''' of '''PoI (x,y)''', we equate 2nd '''derivative''' of given '''function''' to 0
-Equate 2nd derivative of given function to 0
+* Solve to get '''x''' ('''x co-ordinate''' of '''PoI''')
-Solve to get x (x co-ordinate of PoI)
+* Substitute this '''x''' in original '''function''' to get '''y co-ordinate'''
+|| '''Point of inflection'''
+A '''point of inflection PoI''' on a curve is the point where the '''curve''' changes its direction.
-Substitute this x in original function to get y co-ordinate
+To find the '''co-ordinates''' of '''PoI''' '''''x''''' comma '''''y''''',
-|  | A '''point of inflection PoI''' on a curve is the point where the '''curve''' changes its direction.
+We equate second '''derivative''' of the given '''function''' to 0.
-To find the '''co-ordinates''' of '''PoI''' '''''x''''' comma '''''y''''':
-We equate the second '''derivative''' of the given '''function''' to 0.
 Solution of this equation gives us '''x''' ('''x co-ordinate''' of '''PoI''').
 Substitute this '''x''' in original '''function''' to get '''y co-ordinate'''.
 |-
-|  | Let us find the '''point of inflection''' on '''h(x)'''.
+|| Let us find the '''point of inflection''' on '''h(x)'''.
-|  | Let us find the '''point of inflection''' on '''h of x'''.
+|| Let us find the '''point of inflection''' on '''h of x'''.
 |-
-|  | In '''input bar''', type '''Inf''' >> choose '''InflectionPoint ( <Polynomial> )''' option from '''menu'''.
+|| In '''input bar''', type '''Inf''' >> choose '''InflectionPoint ( <Polynomial> )''' option from '''menu'''.
-|  | In '''input bar''', type '''Inf''' and scroll down menu to choose '''InflectionPoint Polynomial''' option.
+|| In '''input bar''', type '''Inf''' and scroll down menu to choose '''InflectionPoint Polynomial''' option.
 |-
-|  | Instead of highlighted '''Polynomial''', type '''h''' >> Press '''Enter'''.
+|| Instead of highlighted '''Polynomial''', type '''h''' >> Press '''Enter'''.
-|  | Instead of highlighted '''Polynomial''', type '''h''' and press '''Enter'''.
+|| Instead of highlighted '''Polynomial''', type '''h''' and press '''Enter'''.
 |-
-|  | Point to the '''point of inflection''' in '''Algebra''' view.
+|| Point to the '''point of inflection''' in '''Algebra''' view.
-|  | In '''Algebra''' view, '''point of inflection''' appears as point '''F''', below the two '''extrema'''.
+|| In '''Algebra''' view, '''point of inflection''' appears as point '''F''', below the two '''extrema'''.
 |-
-|  | Point to '''F''' on '''h(x)''' in '''Graphics''' view.
+|| Point to '''F''' on '''h(x)''' in '''Graphics''' view.
-|  | '''F''' is mapped on '''h of x''' in '''Graphics''' view.
+|| '''F''' is mapped on '''h of x''' in '''Graphics''' view.
 |-
-|  |
+|| point to the function.
-|  | Let us open a new '''GeoGebra''' window to use '''CAS''' for a '''cubic polynomial'''.
+|| Correlate the '''degree''' of the '''polynomials''' and the number of '''roots''' seen so far.
 |-
-|  | Click on '''View''' tool and click on '''CAS''' to show it.
+|| Point to '''CAS'''>> '''Algebra''' >> '''Graphics''' views.
-|  | Click on '''View''' tool and click on '''CAS''' to show it.
+|| Observe that '''functions''' entered in '''CAS''' appear in '''Algebra''' and '''Graphics''' views.
 |-
-|  | In line 1 of '''CAS''' view, type the following line.
+|| Point to '''Algebra''' >> '''Graphics''' views >> '''CAS''' view.
+|| '''Functions''' entered in '''input bar''' appear in '''Algebra''' and '''Graphics''' views but not in '''CAS''' view.
-'''i(x):=x^3-6 x^2+4 x+1''' >> press '''Enter'''.
-|  | In line 1 of '''CAS'' 'view, type the following line.
-'''i x''' in parentheses '''colon equals x caret 3 minus 6 space x caret 2 plus 4 space x plus 1'''.
-Press '''Enter'''.
 |-
-|  | Drag boundary to see '''CAS''' view properly.
+||
-|  | Drag boundary to see '''CAS''' view properly.
+|| Let us summarize.
 |-
-|  | Drag boundary to see '''Algebra''' view properly.
+|| '''Slide Number 11'''
-|  | Drag boundary to see '''Algebra''' view properly.
-|-
-|  | In line 2 of''' CAS''' view, type '''Root(i)''' >> press '''Enter'''.
-|  | In line 2 of''' CAS''' view, type '''Root i''' in parentheses and press '''Enter'''.
-|-
-|  | Point to the three '''roots''' in '''CAS''' view.
-Scroll to see them.
+'''Summary'''
+|| In this tutorial, we have learnt to:
-Point to '''Evaluate''' tool.
+* Plot graphs of '''polynomial functions''' using '''CAS''' view and '''input bar'''
-|  | The three '''roots''' are shown below with '''square root notations'''.
-Scroll to see them.
+* Find '''real roots, extrema''' and '''inflection point(s)'''
-Note that the '''Evaluate''' tool is highlighted.
+* '''Complex roots''' will be covered in another tutorial
 |-
-|  | In line 2, click on the '''roots''' and click on '''Numeric''' tool.
+|| '''Slide Number 12'''
-Point to the three '''roots''' in decimal form.
+'''Assignment'''
-|  | In line 2, click on the '''roots''' and click on '''Numeric''' tool.
-The roots are now shown in '''decimal''' form in the next line.
+* d(x)=x<sup>2</sup>-6x+5
-|-
-|  | In line 4 of '''CAS''' view, type '''Extremum(i)''' >> press '''Enter'''.
-|  | In line 4 of '''CAS''' view, type '''Extremum i''' in parentheses and press '''Enter'''.
-|-
-|  | Point to the two '''extrema''' in '''CAS''' view.
-Scroll to see them.
+* e(x)=3x<sup>3</sup>-2x<sup>2</sup>+0.2x-1
-Point to '''Numeric''' tool and to '''extrema''' in '''decimal''' form.
+* f(x)=-2x<sup>4</sup>-x<sup>3</sup>+3x<sup>2</sup>
-|  | The two '''extrema''' points are shown below.
-Scroll to see them.
+* g(x)=x<sup>5</sup>-7x<sup>4</sup>+9x<sup>3</sup>+23x<sup>2</sup>-50x+24
-As the '''Numeric''' tool was clicked, the points appear in '''decimal''' form.
+* h(x)=(4x+3)/(x-1)
-|-
-|  | Click in and drag '''Graphics''' view so you can see '''i(x)'''.
-|  | Click in and drag '''Graphics''' view so you can see '''i of x'''.
-|-
-|  | In line 5, type '''Inf''' >> choose '''InflectionPoint ( <Polynomial> )''' option from '''menu'''.
-|  | In line 5, type '''Inf''' and scroll down menu to choose '''InflectionPoint Polynomial''' option.
-|-
-|  | Instead of highlighted '''Polynomial''', type '''i''' >> Press '''Enter'''.
-|  | Instead of highlighted '''Polynomial''', type '''i''' and press '''Enter'''.
-|-
-|  | Point to the '''point of inflection''' in '''Algebra''' view.
-|  | '''Co-ordinates''' of '''point of inflection''' appear in curly brackets.
-|-
-|  |
-|  | Correlate the '''degree''' of the '''polynomials''' and the number of '''roots''' seen so far.
-|-
-|  | Point to '''CAS''', then '''Algebra''' and '''Graphics''' views.
-|  | Observe that '''functions''' entered in '''CAS''' appear in '''Algebra''' and '''Graphics''' views.
-|-
-|  | Point to '''Algebra''' and '''Graphics''' views, then '''CAS''' view.
-|  | '''Functions''' entered in '''input bar''' appear in '''Algebra''' and '''Graphics''' views but not in '''CAS''' view.
-|-
-|  |
-|  | Let us summarize.
-|-
-|  | '''Slide Number 12'''
-'''Summary'''
+* i(x)=(3x<sup>2</sup>-2x-1)/(2x<sup>2</sup>+3x-2)
-|  | In this tutorial, we have learnt how to:
+|| Assignment:
-Plot graphs of '''polynomial functions''' using '''CAS''' view and '''input bar'''.
+Plot '''graphs''' and find '''roots''', '''extrema''' and '''inflection points''' for the following '''polynomials'''.
-Find '''real roots, extrema''' and '''inflection point(s)'''.
-'''Complex roots''' will be covered in another tutorial.
 |-
-|  | '''Slide Number 13'''
+|| '''Slide Number 13'''
-'''Assignment'''
-|  | Assignment:
-Plot '''graphs''' and find '''roots''', '''extrema''' and '''inflection points''' for the following '''polynomials'''.
-d(x)=x<sup>2</sup>-6x+5
-e(x)=3x<sup>3</sup>-2x<sup>2</sup>+0.2x-1
-f(x)=-2x<sup>4</sup>-x<sup>3</sup>+3x<sup>2</sup>
-g(x)=x<sup>5</sup>-7x<sup>4</sup>+9x<sup>3</sup>+23x<sup>2</sup>-50x+24
-h(x)=(4x+3)/(x-1)
-i(x)=(3x<sup>2</sup>-2x-1)/(2x<sup>2</sup>+3x-2)
-|-
-|  | '''Slide Number 14'''
 '''About Spoken Tutorial project'''
-|  | The video at the following link summarizes the '''Spoken Tutorial''' project.
+|| The video at the following link summarizes the '''Spoken Tutorial''' project.
 Please download and watch it.
 |-
-|  | '''Slide Number 15'''
+|| '''Slide Number 14'''
 '''Spoken Tutorial workshops'''
-|  | The '''Spoken Tutorial Project''' team conducts workshops and gives certificates.
+|| The '''Spoken Tutorial Project''' team conducts workshops and gives certificates.
 For more details, please write to us.
 |-
-|  | '''Slide Number 16'''
+|| '''Slide Number 15'''
 '''Forum for specific questions:'''
 Do you have questions in THIS Spoken Tutorial?
 Please visit this site.
 Choose the '''minute''' and '''second''' where you have the question.
 Explain your question briefly.
 Someone from our team will answer them.
-|  | Please post your timed queries on this forum.
+|| Please post your timed queries on this forum.
 |-
-|  | '''Slide Number 17'''
+|| '''Slide Number 16'''
 '''Acknowledgement'''
-|  | '''Spoken Tutorial Project''' is funded by '''NMEICT, MHRD''', Government of India.
+|| '''Spoken Tutorial Project''' is funded by '''NMEICT, MHRD''', Government of India.
 More information on this mission is available at this link.
 |-
-|  |
+||
-|  | This is '''Vidhya Iyer''' from '''IIT Bombay,''' signing off.
+|| This is '''Vidhya Iyer''' from '''IIT Bombay,''' signing off.
 Thank you for joining.
 |-
 |}