Question

If $\bigg \lgroup \frac{1+i}{1-i}\bigg \rgroup ^{x}=1$ then
(a) x = 2n +1 , where n is any positive integer
(b) x = 4n , where n is any positive integer
(c) x = 2n , where n is any positive integer
(d) x = 4n +1 , where n is any positive integer.

Answer 1

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