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purple
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Report 17 years ago
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i was given this problem:

if Z^4 = -1, what is Z?

if anyone could help that would be great

thanks
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M Safe
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#2
Report 17 years ago
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(Original post by purple)
i was given this problem:

if Z^4 = -1, what is Z?

if anyone could help that would be great

thanks

Ah a roots of unity question.

Basically what you do is express -1 as e^-i(pi)

therefore all solns will take then form

e^(-pi + 2npi), where n goes from 0 to 3.

and the modulus is ofcourse 1
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purple
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Report 17 years ago
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thanku
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