Answer
$x^{21}$
Work Step by Step
Start with given expression: $(x^{3})^{7}$
Simplify using the power rule: $x^{3\times7}=x^{21}$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.2 - Exponents and Scientific Notation - Exercise Set - Page 30: 31
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