Please explain it,Prove thet the straight line lx + my + n =0 is a normal to the ellipse b^2x^2 + a^2y^2 = a^2b^2 if (a^2 / l^2)+ (b^2 / m^2) = (a^2 - b^2)^2 / (n^2)

Rahul , 7 Years ago

Grade 12