The function f is defined by the power series (-1)" nx" n + 1 2x 3x f(x) = + ... 2 3 + ... + 4 for all real numbers x for which the series converges. The function g is defined by the power series (-1)" x" + ... g(x) = 1 – + 4! +... + 6! (2n)! 2! for all real numbers x for which the series converges. (a) Find the interval of convergence of the power series for f. Justify your answer. (b) The graph of y = f(x) – g(x) passes through the point (0, -1). Find y'(0) and y"(0). Determine whether y has a relative minimum, a relative maximum, or neither at x = 0. Give a reason for your answer.

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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The function f is defined by the power series
(-1)" nx"
n + 1
2x 3x
f(x) =
+ ...
2
3
+ ... +
4
for all real numbers x for which the series converges. The function g is defined by the power series
(-1)" x"
+ ...
g(x) = 1 –
+
4!
+... +
6!
(2n)!
2!
for all real numbers x for which the series converges.
(a) Find the interval of convergence of the power series for f. Justify your answer.
(b) The graph of y = f(x) – g(x) passes through the point (0, -1). Find y'(0) and y"(0). Determine whether y
has a relative minimum, a relative maximum, or neither at x = 0. Give a reason for your answer.
Transcribed Image Text:The function f is defined by the power series (-1)" nx" n + 1 2x 3x f(x) = + ... 2 3 + ... + 4 for all real numbers x for which the series converges. The function g is defined by the power series (-1)" x" + ... g(x) = 1 – + 4! +... + 6! (2n)! 2! for all real numbers x for which the series converges. (a) Find the interval of convergence of the power series for f. Justify your answer. (b) The graph of y = f(x) – g(x) passes through the point (0, -1). Find y'(0) and y"(0). Determine whether y has a relative minimum, a relative maximum, or neither at x = 0. Give a reason for your answer.
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