#### Answer

$3$

#### Work Step by Step

RECALL:
(i) $a^{\frac{1}{4}}=\sqrt[4]{a}$
(ii) $\sqrt[4]{a^4}=|a|$
Use rule (i) above to obtain:
$=\sqrt[4]{81}$
Write 81 as $3^4$:
$=\sqrt[4]{3^4}$
Use rule (ii) above to obtain:
$=|3|
\\=3$

Published by
Pearson

ISBN 10:
0-13417-805-X

ISBN 13:
978-0-13417-805-9

$3$

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