Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN: 9780134463216
Author: Robert F. Blitzer
Publisher: PEARSON
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Question

1.) Let G={1,−1,i,−i} be the group of 4 complex numbers under multiplication. 

(a) Is {1,i} a subgroup of G and why?

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