College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter R - Section R.6 - Rational Exponents - R.6 Exercises - Page 56: 53

Answer

$-27$

Work Step by Step

Apply the rule: $a^{\frac{m}{n}}=(a^{\frac{1}{n}})^m$ $-81^{\frac{3}{4}}=-(81^{\frac{1}{4}})^3$ Perform the rational expression and simplify. $-81^{\frac{3}{4}}=-(3)^3=-27$
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