Answer
$\dfrac{1}{(-2)^3} = \dfrac{1}{-8}$
Work Step by Step
The error was that the negative sign on the denominator was incorrectly moved to the exponent.
Hence,
$\dfrac{1}{(-2)^3}=\dfrac{1}{-8}$
College Algebra (11th Edition)
by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671791
ISBN 13:
978-0-32167-179-0
Chapter R - Review Exercises - Page 77: 123
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