Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 8 - Section 8.6 - Rational Exponents - Exercise Set: 10

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: $=|3| \\=3$
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