Answer
$\dfrac {1}{4}$
Work Step by Step
$a_{n}=4\left( \dfrac {1}{2}\right) ^{n-1}\Rightarrow a_{5}=4\times \left( \dfrac {1}{2}\right) ^{5-1}=4\times \left( \dfrac {1}{2}\right) ^{4}=\dfrac {1}{4}$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 11 - Further Topics in Algebra - 11.3 Geometric Sequences and Series - 11.3 Exercises - Page 1033: 4
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