Answer
Conjugate: 0+4i
Module: 4+0i
Work Step by Step
The conjugate of a-bi = a+bi, so
The conjugate of 0-4i = 0+4i
The module is $\sqrt (0^{2}+4^{2})$ = 4
Calculus: Early Transcendentals 8th Edition
by Stewart, James
Published by
Cengage Learning
ISBN 10:
1285741552
ISBN 13:
978-1-28574-155-0
APPENDIX H - Complex Numbers - H Exercises - Page A 64: 17
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