Answer
$9$.
Work Step by Step
The given expression is
$=(3^{-2})^{-1}$
Use the law of exponents $(a^{m})^n=a^{mn}$
We have $a=3,m=-2$ and $n=-1$
$=3^{(-2)(-1)}$
Simplify.
$=3^{2}$
Use $3^2=9$
$=9$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Appendix A - Review - A.1 Algebra Essentials - A.1 Assess Your Understanding - Page A12: 91
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