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The two circles which passes through (0,...

The two circles which passes through (0,a) and (0,-a) and touch the line` y = mx+c` will intersect each other at right angle ,if

A

`a^2=c^2(2m+1)`

B

`a^2=c^2(2+m^2)`

C

`c^2=a^2(2+m^2)`

D

`c^2=a^2(2m+1)`

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PATHFINDER-CIRCLE-QUESTION BANK
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