#### Answer

$-3$

#### Work Step by Step

RECALL:
$a^{\frac{1}{n}}=\sqrt[n]{a}$
$\sqrt [n] {a^{n}}=a$
With $n=4$, use the rules above to obtain:
$-81^{\frac{1}{4}}
\\=-(81^{\frac{1}{4}})
\\=-\sqrt[4]{81}
\\ -\sqrt[4] {3^{4}}
\\-3$

Published by
Pearson

ISBN 10:
0-13417-894-7

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

$-3$

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