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Find the condition if the circle whose e...

Find the condition if the circle whose equations are `x^2+y^2+c^2=2a x` and `x^2+y^2+c^2-2b y=0` touch one another externally.

A

`(1)/(b^(2))+(1)/(c^(2))=(1)/(a^(2))`

B

`(1)/(c^(2))+(1)/(a^(2))=(1)/(b^(2))`

C

`(1)/(a^(2))+(1)/(b^(2))=(1)/(c^(2))`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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