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The set {R e((2i z)/(1-z^2)) |z|=1,z=+-1...

The set `{R e((2i z)/(1-z^2)) |z|=1,z=+-1}`(where z is a complex number) is________.

A

`(-infty,-1] cap [1,infty)`

B

`(-infty,0) cup (0,infty)`

C

`(-infty,-1] cup [1,infty)`

D

`[2,infty)`

Text Solution

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The correct Answer is:
A
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