40 (a) Evaluate the integral: / da x² + 4 Your answer should be in the form kn, where k is an integer. What is the value of k? d. -arctan(x) dx 1 Hint: x2 +1 k

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.3: Geometric Sequences
Problem 50E
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Question
40
(a) Evaluate the integral:
dx
x2 + 4
Your answer should be in the form kr, where k is an integer. What is the value of k?
d
1
-arctan(x)
da
Hint:
x2 + 1
k =
(b) Now, let's evaluate the same integral using a power series. First, find the power series for the function
40
f(x)
. Then, integrate it from 0 to 2, and call the result S. S should be an infinite series.
x2 + 4
What are the first few terms of S?
ao
aj =
a2 =
a3 =
a4 =
(c) The answers to part (a) and (b) are equal (why?). Hence, if you divide your infinite series from (b) by k
(the answer to (a)), you have found an estimate for the value of 7 in terms of an infinite series.
Approximate the value of T by the first 5 terms.
(d) What is the upper bound for your error of your estimate if you use the first 9 terms? (Use the
alternating series estimation.)
Transcribed Image Text:40 (a) Evaluate the integral: dx x2 + 4 Your answer should be in the form kr, where k is an integer. What is the value of k? d 1 -arctan(x) da Hint: x2 + 1 k = (b) Now, let's evaluate the same integral using a power series. First, find the power series for the function 40 f(x) . Then, integrate it from 0 to 2, and call the result S. S should be an infinite series. x2 + 4 What are the first few terms of S? ao aj = a2 = a3 = a4 = (c) The answers to part (a) and (b) are equal (why?). Hence, if you divide your infinite series from (b) by k (the answer to (a)), you have found an estimate for the value of 7 in terms of an infinite series. Approximate the value of T by the first 5 terms. (d) What is the upper bound for your error of your estimate if you use the first 9 terms? (Use the alternating series estimation.)
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