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Question

The complex number(s) z satisfying zn=(z1)n in the Argand plane

A
are concylic
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B
lie on a line parallel to x axis
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C
lie on a line parallel to y-axis
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D
lie on the vertices of regular polygon of (n1) sides
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Solution

The correct option is C lie on a line parallel to y-axis
zn=(z1)n
(zz1)n=1
Hence,
|z|=|z1|
Let z=x+iy
x2+y2=x22x+1+y2
x=12
Hence, option C is correct.

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