class 11 Math Co-ordinate Geometry Ellipse

The eccentricity of an ellipse whose centre is at the origin is $21 ˙$if one of its directrices is $x=−4,$then the equation of the normal to it at $(1,23 )$is:$4x+2y=7$(2) $x+2y=4$ (3) $2y−x=2$ (4) $4x−2y=1$

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