Answer
$128$
Work Step by Step
The general formula to find the nth term of a Geometric sequence is given as: $ a_{n}=a_1r^{n-1}$
Here, $ a_1=1$ and $ r=2$
Plug $ n=8$
$ a_{8}=1 \times (2)^{8-1}=1 \times (2)^{7}=128$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 10 - Review Exercises - Page 1125: 38
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