The locus of the point which divides the double ordinates of the ellipse `(x^2)/(a^2)+(y^2)/(b^2)=1` in the ratio `1:2` internally is `(x^2)/(a^2)+(9y^2)/(b^2)=1` (b) `(x^2)/(a^2)+(9y^2)/(b^2)=1/9` `(9x^2)/(a^2)+(9y^2)/(b^2)=1` (d) none of these

The locus of the point which divides the double ordinates of the ellipse (x^(2))/(a^(2))+(y^(2))/(b^(2))=1 in the ratio 1:2 internally is (x^(2))/(q^(2))+(9y^(2))/(b^(2))=1 (b) (x^(2))/(a^(2))+(9y^(2))/(b^(2))=(1)/(9)(9x^(2))/(a^(2))+(9y^(2))/(b^(2))=1( d) none of these

The coordinates of a focus of the ellipse 4x^(2) + 9y^(2) =1 are

The coordinates of a focus of the ellipse 4x^(2) + 9y^(2) =1 are

The coordinates of the foci of the ellipse 4x^(2) + 9y^(2) = 1 are

The locus of the point of intersection of perpendicular tangents to the ellipse (x - 1)^2/16 + (y-2)^2/9= 1 is

The eccentricity of the ellipse 5x^(2)+9y^(2)=1 is

What is the area of the ellipse 4x^(2) + 9y^(2) = 1 .

Find the locus of the mid-point of the chord of the ellipse (x^(2))/(16) + (y ^(2))/(9) =1, which is a normal to the ellipse (x ^(2))/(9) + (y ^(2))/(4) =1.

The eccentricity of the ellipse 5x^(2) + 9y^(2) = 1 is _

The mid point of the chord 16x+9y=25 to the ellipse (x^(2))/(9)+(y^(2))/(16)=1 is