Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 12 Sequences and Series - 12.3 Analyze Geometric Sequences and Series - 12.3 Exercises - Skill Practice - Page 814: 28


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Work Step by Step

The sequence is geometric with first term $a_1=5$ and common ratio $r=3$. So, a rule for the nth term is:$$a_n=a_1r^{n-1}=5*3^{n-1}$$ The first 6 terms are: $a_1=5\\a_2=15\\a_3=45\\a_4=135\\a_5=405\\a_6=1215$
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