#### Answer

$\dfrac{1}{b^n}$

#### Work Step by Step

In order to simplify, we use the negative exponent rule.
The negative-exponent rule states that:
$b^{-n} = \dfrac{1}{b^n}, b \ne 0$

Published by
Pearson

ISBN 10:
0-13417-894-7

ISBN 13:
978-0-13417-894-3

$\dfrac{1}{b^n}$

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