College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter R - Section R.2 - Algebra Essentials - R.2 Assess Your Understanding: 81

Answer

$9$

Work Step by Step

RECALL: (1) $a^m \cdot a^n = a^{m+n}$ (2) $a^{-m} = \dfrac{1}{a^m}, a \ne 0$ (3) $(a^m)^n=a^{mn}$ Use rule (3) above to obtain: $=3^{(-2)(-1)} \\=3^{2} \\=3(3) \\=9$
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