Answer
The value of $\mid r\mid$.
Work Step by Step
If $\mid r\mid $ is less than 1, then the series will have a sum. Otherwise, it will not have a sum.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 12 Sequences and Series - 12.4 Find Sums of Infinite Geometric Series - 12.4 Exercises - Skill Practice - Page 823: 2
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