Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 10 - Cumulative Review: 30

Answer

$\frac{1}{27}$

Work Step by Step

$81^{-\frac{3}{4}}=\frac{1}{81^{\frac{3}{4}}}=\frac{1}{(3^{4})^{\frac{3}{4}}}=\frac{1}{(3)^{4\times\frac{3}{4}}}=\frac{1}{3^{3}}=\frac{1}{27}$
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