1.

The point from which the tangents to the circles x^2+y^2-8x+40=0, 5x^2+5y^2-25x+80=0 and x^2+y^2-8x+16y+160=0 are equal in length is

Answer»

`(8,(-15)/2)`
`(-8,15/2)`
`(8,15/2)`
`(-8,(-15)/2)`

ANSWER :A


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