The eccentricity of an ellipse with its centre at the origin is `(1)/(2) ` . If one of the directrices is x = 4 , then the equation of ellipse is

The eccentricity of an ellipse whose centre is at the origin is (1)/(2) .If one of its directrices is x=-4, then the equation of the normal to it at (1,3) is :

The eccentricity of an ellipse whose centre is at the origin is (1)/(2) .if one of its directrices is x=-4, then the equation of the normal to it at (1,(3)/(2)) is: 4x+2y=7(2)x+2y=4(3)2y-x=2(4)4x-2y=1

The eccentricity of an ellipse, with centre at the origin is 2/3. If one of directrices is x = 6, then equation of the ellipse is

The eccentricity of an ellipse with centre at the orgin and axes along the coordinate axes , is 1/2 if one of the directrices is x=4, the equation of the ellipse is

The differential equation of all ellipses centred at the origin is

Foci of an ellipse are (pm 5, 0) and one of its directrices is 5x = 36 . Then its equation is

If the distance foci of an ellipse is 8 and distance between its directrices is 18 , then the equation of the ellipse is