if focus of a parabola is(1,2) and feet of perpendiculars on any two tangents to this parabola from locus are (3,4) and (4,6) then the vertex of parabola is

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- October 22nd 2011, 12:04 PMprasumparabola
if focus of a parabola is(1,2) and feet of perpendiculars on any two tangents to this parabola from locus are (3,4) and (4,6) then the vertex of parabola is

how to use above information help - October 22nd 2011, 12:15 PMearbothRe: parabola
Maybe you are looking for this(?): Parabola -- from Wolfram MathWorld

Scroll down below equation (16)!