Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Question
Use the alternating series test to study the convergence of the following series
![The image displays a mathematical series expression:
\[
\sum_{n=1}^{\infty} (-1)^{n+1} n e^{-n}
\]
This expression represents an infinite series that sums terms of the form $(-1)^{n+1} n e^{-n}$ starting from $n = 1$ to infinity. In this series:
- $(-1)^{n+1}$ introduces an alternating sign based on the value of $n$.
- $n$ is the term index, multiplying the exponential factor.
- $e^{-n}$ is the exponential decay factor, where $e$ is the base of the natural logarithm.
This series can be used in various applications, including mathematics and physics, to model phenomena that exhibit alternating behavior with exponentially decreasing terms.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc67522ae-2086-4687-8649-9ef0ac400e4c%2Fa48fe80e-b646-4565-bff7-22525b6365d4%2Fzf002e_processed.png&w=3840&q=75)
Transcribed Image Text:The image displays a mathematical series expression:
\[
\sum_{n=1}^{\infty} (-1)^{n+1} n e^{-n}
\]
This expression represents an infinite series that sums terms of the form $(-1)^{n+1} n e^{-n}$ starting from $n = 1$ to infinity. In this series:
- $(-1)^{n+1}$ introduces an alternating sign based on the value of $n$.
- $n$ is the term index, multiplying the exponential factor.
- $e^{-n}$ is the exponential decay factor, where $e$ is the base of the natural logarithm.
This series can be used in various applications, including mathematics and physics, to model phenomena that exhibit alternating behavior with exponentially decreasing terms.
Expert Solution
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Step 1
Alternating series:
A series of the form
where either all an are positive or all an are negative, is called an alternating series.
The alternating series test then says: if decreases monotonically and then the alternating series converges.
Moreover, let L denote the sum of the series, then the partial sum
approximates L with error bounded by the next omitted term:
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