Question

If the distances of a point moving on a conic from its focus and from its directrix are "a" and "b" respectively its eccentricity will be equal to 1:- a/b , 2:- b/a , 3:- a×b , 4:- none of these​

Answer 1

Answer:

The locus of a point P moving in a plane such a way that its distance from the fixed point is always equal to its distance from Directrix. Eccentricity is 1. So the conic is Parabola.