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If ((1+i)/(1-i))^(x)=1, then-...

If `((1+i)/(1-i))^(x)=1,` then-

A

`x=2n+1` where n is any positive integer

B

`x=2n` where n is any positive integer

C

`x=4n+1` where n is any positive interger

D

`x=4n` where n is any positive integer

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The correct Answer is:
D
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 7
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  10. Two roots of the quadratic equation ix^(2) -10x -21i=0 is-

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