Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 14 - Sequences, Series, and the Binomial Theorem - 14.3 Geometric Sequences and Series - 14.3 Exercise Set - Page 912: 15

Answer

$-\frac{1}{2}$

Work Step by Step

If we want to get the common ratio, we just have to divide any two subsequent terms: $r=\frac{a_2}{a_1}=\frac{-\frac{1}{4}}{\frac{1}{2}}=-\frac{1}{2}$
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