University Calculus: Early Transcendentals (3rd Edition)

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

Chapter 9 - Section 9.4 - Comparison Tests - Exercises - Page 509: 58

Answer

Converges

Work Step by Step

We are given that $\Sigma a_n$ is convergent. and $\Sigma a_n \gt 0$ and $\Sigma b_n \gt 0$ Let us consider $l=\lim\limits_{n \to \infty} \dfrac{(a_n)^2}{a_n} =\lim\limits_{n \to \infty} a_n=0$ Hence, the given series $\Sigma _{n=1}^\infty (a_n)^2$ converges by the limit comparison test.
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