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

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 :

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 equation to the normal to the parabola y^(2)=4x at (1,2) is

The equation of the normal to the circle x^(2)+y^(2)+6x+4y-3=0 at (1,-2) to is

The eccentricity of the ellipse x^(2)+4y^(2)+8y-2x+1=0 , is

Eccentricity of the ellipse 4x^2+y^2-8x+2y+1=0 is

The eccentricity of ellipse 4(x-2y+1)^2 +9(2x+y+2)^2=180 is

The eccentricity of the ellipse 5x^2+9y^2=1 is a. 2//3 b. 3//4 c. 4//5 d. 1//2

The eccentricity of the ellipse 5x^2+9y^2=1 is a. 2//3 b. 3//4 c. 4//5 d. 1//2

An ellipse is drawn by taking a diameter of the circle (x-1)^2+y^2=1 as its semi-minor axis and a diameter of the circle x^2+(y-2)^2=4 as its semi-major axis. If the centre of the ellipse is the origin and its axes are the coordinate axes, then the equation of the ellipse is (1) 4x^2+""y^2=""4 (2) x^2+""4y^2=""8 (3) 4x^2+""y^2=""8 (4) x^2+""4y^2=""16