Find the equation of an ellipse the distance between the foci is 8 units and the distance between the directrices is 18 units.

In an ellipse the distance between the foci is 8 and the distance between the directrices is 25. The length of major axis, is

e = 3/2 and distance between directrices = 8/3

In an ellipse the distance between the foci is 8 and the distance between the directrices is 25, then the ratio of the length of major and minor axis is

In an ellipse the distance between the foci is 8 and the distance between the directrices is 25. The length of major axis is : (A) 5sqrt(2) (B) 10sqrt(2) (C) 20sqrt(2) (D) none of these

Distance between foci is 4 and distance between directrices is 5

If m times distance between foci of an ellipse is equal to n times distance between its directrices , then

Can the distance between foci of an ellipse be equal to distance its directrices ?

If the distance between the directrices is thrice the distance between the foci, then find eccentricity of the ellipse.