Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 7 - Section 7.7 - Complex Numbers - Exercise Set: 86

Answer

$-1$

Work Step by Step

RECALL: (1) $a^{mn} = (a^m)^n$ (2) $i^2=-1$ Use rule (1) above to obtain: $=(i^2)^7$ Use rule (2) above to obtain: $=(-1)^7 \\=(-1)(-1)(-1)(-1)(-1)(-1)(-1) \\=-1$
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