Answer
$a_1=5; a_n=a_{n-1}.\frac{1}{2}$
Work Step by Step
The common ratio of the geometric sequence is $\frac{1}{2}$.
Hence, the recursive formula that represents the geometric sequence is:
$a_1=5; a_n=a_{n-1}.\frac{1}{2}$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 7 - Exponents and Exponential Functions - Chapter Review - Page 478: 83
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