Answer
$x^{21}$
Work Step by Step
When an exponential expression is raised to a power, multiply the exponents: $$(x^{3})^{7}$$
$$=x^{(3\times7)}$$
$$=x^{21}$$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.2 - Page 33: 31
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