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 586: 24

Answer

Divergent

Work Step by Step

Let us consider $f(x)=\dfrac{1}{2x-1}$ Here, the function $f(x)$ is positive, continuous and decreasing for $x \geq 0$ Then, $\lim\limits_{k \to \infty} \int_1^k \dfrac{1}{ 2x-1}dx= \lim\limits_{k \to \infty}(\dfrac{1}{2}) [\ln (2k-1)-\ln 1]=\infty$ Hence, the sequence $\Sigma_{n=0}^\infty \dfrac{1}{ 2n-1}$ is Divergent.
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