Answer
$3\sqrt[3]3$
Work Step by Step
$\sqrt[3] 81=\sqrt[3](27\times3)=\sqrt[3]27\times\sqrt[3]3=3\sqrt[3]3$
We know that $\sqrt[3] 27=3$, because $3^{3}=3\times3\times3=27$.
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter P - Summary, Review, and Test - Review Exercises - Page 90: 58
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