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 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, 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

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

Let x=4 be a directrix to an ellipse whose centre is at the origin and its eccentricity is (1)/(2) . If P(1, beta), beta gt 0 is a point on this ellipse, then the equation of the normal to it at P is :