Find the equation of an ellipse with eccentricity e, focus F (0,ae) and the ine `y= a/e =0` as directrix.

Find the equation of the ellipse with foci at (+-5 ,0) and x=36/5 as one directrix .

The equation of the parabola with the focus (3,0) and directrix x+3=0 is

Find the equation of the ellipse with e=3/4 , foci on y-axis, centre at the origin, and passing through the point (6, 4).

Find the equation of the parabola whose focus is (5,3) and directrix is the line 3x-4y+1=0.

Find the equation of the ellipse whose focus is (1,-1), the corresponding directrix is x-y-3=0, and eccentricity is 1/2 .

Find the equation of the parabola whose focus is at (-1,-2) and the directrix the line x-2y+3=0

Find the equation of the parabola with vertex at (0, 0) and focus is at (0, 2).

Find the equation of the following parabola : Vertex (0,0), Focus (3, 0) .