Thomas' Calculus 13th Edition

Published by Pearson
ISBN 10: 0-32187-896-5
ISBN 13: 978-0-32187-896-0

Chapter 10: Infinite Sequences and Series - Section 10.3 - The Integral Test - Exercises 10.3 - Page 587: 52

Answer

$n \geq 1178$

Work Step by Step

Consider $\int_n^\infty \dfrac{1}{(x)(\ln x)^{3}}dx \lt 0.01$ and $ \lim\limits_{k \to \infty} [\dfrac{(-1)}{(2)(\ln (k))^{2}}+\dfrac{1}{(2)(\ln n)^2}\lt 0.01$ Thus, $n \gt e^{(\sqrt {50})} \approx 1177.405 \implies n \geq 1178$ Hence, $n \geq 1178$
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