If the circle x^2 + y^2 + 2x - 2y + 4 = ...

If the circle `x^2 + y^2 + 2x - 2y + 4 = 0` cuts the circle `x^2 + y^2 + 4x - 2fy +2 = 0` orthogonally, then f =

A

1

B

2

C

`-1`

D

`-2`

Text Solution

Verified by Experts

The correct Answer is:

C

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