1.

If the polar of a point P w.r.t. the circle x^2+y^2=a^2touches the circle (x- a)^2 + y^2 = a^2, then P lies on:

Answer»

`x^2+2ay=a^2`
`x^2-2ay=a^2`
`y^2-2ax=a^2`
`y^2+2ax=a^2`

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