Answer
$a_{n}=5n-4$
Work Step by Step
We see that the common difference between the successive elements in the sequence is 5. Thus the next term would be 5+16 =21. And the formula would be $a_{n}=5(n-1)+1$
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 - 12.1 Define and Use Sequences and Series - 12.1 Exercises - Skill Practice - Page 798: 15
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