Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

Chapter 11 - Section 11.1 - Sequences - 11.1 Exercises - Page 704: 45

Answer

Converges to $1$.

Work Step by Step

Given: $a_n=nsin(\frac {1} {n})$ It can be re-written as $a_n=\frac{sin(\frac {1} {n})}{\frac {1}{n}}$ $\lim\limits_{n \to \infty}a_n=\lim\limits_{n \to \infty}\frac{sin(\frac {1} {n})}{\frac {1}{n}}$ Consider $\frac {1}{n}=x$ and $x \to 0$ as $n \to \infty $ Thus, $=\lim\limits_{x \to 0} \frac {sin(x)}{x}$ Note that the limit is of the form $\frac{0}{0}$ Therefore, we can apply L-Hospital's Rule. $=\lim\limits_{x \to 0} \frac {cos(x)}{1}$ $=1$ Therefore, the given sequence converges to $1$.
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