Answer
$(b)\; (a^m)^n=a^{m+n}$.
Work Step by Step
By using the law of exponents we can write
$(a^m)^n=a^{m \cdot n}$
Hence, the correct option is $(b)\; (a^m)^n=a^{m+n}$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Appendix A - Review - A.1 Algebra Essentials - A.1 Assess Your Understanding - Page A11: 6
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