Question 2 Consider the function f: [-1, 1] → R f(x) = (x - 1)ª ln(x²+x+1), where a, b are the last two digits of your student number, which are greater than 1. The shape of the function is complicated enough that it is hard to draw using hand calculations. You will use Taylor polynomials to approximate different parts of the function to estimate the shape of its graph and to approximate some stationary points. If you wish you can use a graphing calculator or an app or web site to see the computed shape of the graph, however, this is not necessary and your answer should contain only information you have calculated below, not information from another source. It is fine to use a normal calculator if you need to find the decimal expression of a value to plot it. (a) Write down f(x) for your a and b (and use it for this and the remaining questions). Calculate the first and second derivatives f'(x) and f"(z) (no need to simplify the expressions). (b) Calculate the three different second-order Taylor polynomials (T₂f)(z) centred around three r-values: r = -1, r=0 and x = 1. Show all working. (e) Either by hand, or by using a computer program, draw the three graphs of second-order Taylor polynomials determined in (b), in one figure.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.4: Logarithmic Functions
Problem 46E
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Question 2 Consider the function f: [-1, 1] → R
f(x) = (x - 1)ª ln(x²+x+1),
where a, b are the last two digits of your student number, which are greater than 1. The shape of the
function is complicated enough that it is hard to draw using hand calculations. You will use Taylor
polynomials to approximate different parts of the function to estimate the shape of its graph and to
approximate some stationary points. If you wish you can use a graphing calculator or an app or web
site to see the computed shape of the graph, however, this is not necessary and your answer should
contain only information you have calculated below, not information from another source. It is fine
to use a normal calculator if you need to find the decimal expression of a value to plot it.
(a) Write down f(x) for your a and b (and use it for this and the remaining questions). Calculate
the first and second derivatives f'(x) and f"(r) (no need to simplify the expressions).
(b) Calculate the three different second-order Taylor polynomials (T₂f) (r) centred around three
x-values: x= -1, z = 0 and a = 1. Show all working.
(c) Either by hand, or by using a computer program, draw the three graphs of second-order Taylor
polynomials determined in (b), in one figure.
(d) Recall that a Taylor polynomial is a good approximation close to the point it is centred around,
but often a bad approximation away from that point. You will be asked (e) to sketch, by hand,
the approximate shape of the graph of f(x). However, you are allowed to calculate the value
of f at two chosen values of z. Based on the graphs of (c), what values would you choose?
Explain why, and provide the value of f at those points.
(e) Using (d), sketch, by hand, the approximate shape of the graph of f(x) between x = -1 and
x = 1, in the same figure as in (c). Use a different colour or different style (e.g. dashed) to
distinguish it from the Taylor polynomials you have drawn.
20433209 this is student number (Need Asap)
Transcribed Image Text:Question 2 Consider the function f: [-1, 1] → R f(x) = (x - 1)ª ln(x²+x+1), where a, b are the last two digits of your student number, which are greater than 1. The shape of the function is complicated enough that it is hard to draw using hand calculations. You will use Taylor polynomials to approximate different parts of the function to estimate the shape of its graph and to approximate some stationary points. If you wish you can use a graphing calculator or an app or web site to see the computed shape of the graph, however, this is not necessary and your answer should contain only information you have calculated below, not information from another source. It is fine to use a normal calculator if you need to find the decimal expression of a value to plot it. (a) Write down f(x) for your a and b (and use it for this and the remaining questions). Calculate the first and second derivatives f'(x) and f"(r) (no need to simplify the expressions). (b) Calculate the three different second-order Taylor polynomials (T₂f) (r) centred around three x-values: x= -1, z = 0 and a = 1. Show all working. (c) Either by hand, or by using a computer program, draw the three graphs of second-order Taylor polynomials determined in (b), in one figure. (d) Recall that a Taylor polynomial is a good approximation close to the point it is centred around, but often a bad approximation away from that point. You will be asked (e) to sketch, by hand, the approximate shape of the graph of f(x). However, you are allowed to calculate the value of f at two chosen values of z. Based on the graphs of (c), what values would you choose? Explain why, and provide the value of f at those points. (e) Using (d), sketch, by hand, the approximate shape of the graph of f(x) between x = -1 and x = 1, in the same figure as in (c). Use a different colour or different style (e.g. dashed) to distinguish it from the Taylor polynomials you have drawn. 20433209 this is student number (Need Asap)
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