Answer
$-i$
Work Step by Step
$i^{-9} = (i^9)^{-1} = ((i^4)^2) * i)^{-1} = (1^2 * i)^{-1} = i ^ {-1} = -i$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 10 - Section 10.7 - Complex Numbers - Exercise Set - Page 740: 78
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
