Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 11 - Review Exercises - Page 840: 23


See below.

Work Step by Step

$a_3-a_2=\frac{7}{8}-\frac{15}{16}=\frac{14}{16}-\frac{15}{16}=-\frac{1}{16}= a_2-a_1=\frac{15}{16}-1=\frac{-1}{16} $, thus this is an arithmetic sequence.
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