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If the number (z-1)/(z+1) is purely imag...

If the number `(z-1)/(z+1)` is purely imaginary, then

A

`|z| gt 1`

B

` | z | lt 1 `

C

` | z| = 1 `

D

`| z| gt 2 `

Text Solution

Verified by Experts

The correct Answer is:
C
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