Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter P - Section P.3 - Radicals and Rational Exponents - Exercise Set - Page 47: 124

Answer

See explanations.

Work Step by Step

Step 1. Recall the formulas $\sqrt[n] a^n=a$ when $n$ is odd, and $\sqrt[n] a^n=|a|$ when $n$ is even, we have $\sqrt[3] {(-5)^3}=-5$ for $n=3$ Step 2. In the second case, we have $\sqrt[4] {(-5)^4}=|-5|=5$ for $n=4$
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