Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 11 - Section 11.5 - Imaginary Numbers - Exercise - Page 378: 13

Answer

$$-j.$$

Work Step by Step

Since $j=\sqrt{-1}$, $j^2=-1$, we have $$ j^3=j^2j=-j.$$
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