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If circles x^(2) + y^(2) + 2g(1)x + 2f(...

If circles ` x^(2) + y^(2) + 2g_(1)x + 2f_(1)y = 0` and
` x^(2) + y^(2) + 2g_(2)x + 2f_(2)y = 0 ` touch each other, then

A

`f_(1)g = fg_(1)`

B

`f f_(1) =g g_(1)`

C

`f^(2) +g^(2) = f_(1)^(2) +g_(1)^(2)`

D

`f_(1)^(2) + f^(2) =g_(1)^(2) + g^(2)`

Text Solution

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The correct Answer is:
A
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