Answer
$a_1=20
\\a_2=10
\\a_3=5
\\a_4=2.5
\\a_5=1.25$
Work Step by Step
Multiply the common ratio to get the next term to obtain:
$a_1=20
\\a_2=20(\frac{1}{2}) = 10
\\a_3=10(\frac{1}{2})=5
\\a_4=5(\frac{1}{2})=2.5
\\a_5=2.5(\frac{1}{2}) = 1.25$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 11 - Section 11.3 - Geometric Sequences and Series - Exercise Set - Page 854: 11
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