e1 and e2 are the eccentricities of two conics S and S1. If e12+e22 = 3 then both S and S1 can be
ellipse
parabolas
hyperbolas
circles
Given e21+e22=3 ∴ e1ande2>1)
∴ Both are hyperbolas .
If e1 is the eccentricity of the conic 9x2+4y2=36 and e2 is the eccentricity of the conic 9x2−4y2=36,then