Calculus 8th Edition

Published by Cengage
ISBN 10: 1285740629
ISBN 13: 978-1-28574-062-1

Chapter 11 - Infinite Sequences and Series - Review - True-False Quiz - Page 824: 8

Answer

TRUE

Work Step by Step

Ratio Test: $\lim\limits_{n \to +\infty}|\frac{a_{n}+1}{a_{n}}|=\lim\limits_{n \to +\infty}|\frac{1}{n+1!}\times \frac{n!}{1}|$ Here, $\frac{1}{n+1!}$ can also written as $\frac{1}{n+1!}=\frac{1}{n!}\times \frac{1}{n+1}$ Therefore, $\lim\limits_{n \to +\infty}|\frac{a_{n+1}}{a_{n}}|=\lim\limits_{n \to +\infty}|\frac{1}{n+1}|=0$ So, the given series converges by Ratio Test when limit equals $0$ which is $\lt 1$ . Hence, the statement is TRUE.
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