1.

The locus of the points of intersection of tangents to y^2 = 4ax which intercept a constant length d on the directrix is:

Answer»

`(y^2-4ax)(x+a)^2=d^2x^2`
`(x^2-4ay)(x+a)^2=dx^2`
`(y^2-x)(x+a)^2=x^2`
NONE of these

Answer :A


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