Answer
See below.
Work Step by Step
An infinite geometric sequence has a sum if the common ratio $r$ is between $-1$ and $1$ and $r\ne0$.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 11 - Section 11.3 - Geometric Sequences and Series - Exercise Set - Page 857: 104
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