Question

find equation of parabola if focus is (5, 1) and directix is 3x -4y+5=0​

Answer 1

Let, P(x,y) be the point on the ellipse,and  F(1,2) is focus .

According to definition of ellipse, distance of point P from focus is e times its distance from directrix,

 where e is eccentricity.

If M be foot of perpendicular from P on directrix, then

PF=ePM

⇒(PF)=e2(PM)2

Answer 2

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