University Calculus: Early Transcendentals (3rd Edition)

Published by Pearson
ISBN 10: 0321999584
ISBN 13: 978-0-32199-958-0

Chapter 9 - Practice Exercises - Page 552: 18

Answer

Converges to $0$.

Work Step by Step

As we know that a sequence converges when $\lim\limits_{n \to \infty}a_n$ exists. Consider $a_n= \Sigma_{n=1}^{\infty}\dfrac{(-4)^n}{n!}$ $\Sigma_{n=1}^{\infty}\dfrac{x^n}{n!}=e^x$ Thus, $a_n= \Sigma_{n=1}^{\infty}\dfrac{(-4)^n}{n!}=e^{-4}$ Apply limits to both sides. $\lim\limits_{n \to \infty}a_n=\lim\limits_{n \to \infty} e^{-4}$ Since, the term does not consist any n-term so the sequence must be converges to $0$.
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