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Question

If z is a complex number such that |z|=1, then 1¯z is

A
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B
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C
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D
1
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Solution

The correct option is D 1
Let z=x+iy|z|=x2+y2=1x2+y2=11z=1x+iyxiyx2+y2=xiy1z=x2+y2=1

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