Answer
$a^{-9}$
Work Step by Step
RECALL:
$a^{-m} =\dfrac{1}{a^m}, a\ne 0$
Using the rule above gives:
$\dfrac{1}{a^9} = a^{-9}$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 4 - Polynomials - Review Exercises: Chapter 4 - Page 298: 20
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