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Let (z-alpha)/(z+alpha) is purely imagin...

Let `(z-alpha)/(z+alpha)` is purely imaginary and `|z|=2, alphaepsilonR` then `alpha` is equal to (A) `2` (B) `1` (C) `sqrt2` (D) `sqrt3`

A

1

B

2

C

`sqrt(2)`

D

`(1)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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