The smallest positive integral value of \( n \) for
which \( \left(\frac{1-i}{1+i}\right)^{n} \)... VIDEO
The smallest positive integral value of \( n \) for
which \( \left(\frac{1-i}{1+i}\right)^{n} \) is purely imaginary with positive imaginary part, is
(A) 1
(B) 3
(C) 5
(D) none of these
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