Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 11 - Sequences; Induction; the Binomial Theorem - Chapter Review - Review Exercises - Page 859: 24

Answer

Diverges

Work Step by Step

An infinite geometric series is said to converge if and only if $|r|\lt1$, and diverges when $|r| \gt 1$. The sum of a geometric series can be expressed as: $a_n=\dfrac{a_1}{1-r}$ where $a_1=\ First \ Term$ and $r$ is the common ratio of the quotient of two consecutive terms. Since, $a_1=2$ and $r=\dfrac{a_2}{a_1}=\dfrac{3/4}{1/2}=\dfrac{3}{2} $ Because $r= |\dfrac{3}{2}| =\dfrac{3}{2} \gt 1$ Therefore, the series diverges.
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