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Find the equation of latus rectum of parabola x^2=-100y.(a) x=25(b) x=-25(c) y=-25(d) y=25I got this question in an interview.This is a very interesting question from Conic Sections topic in division Conic Sections of Mathematics – Class 11

Answer»

Correct ANSWER is (C) y=-25

For explanation: Comparing equation with x^2=-4ay.

4a=100 => a=25. Line PASSING through focus perpendicular to axis is latus RECTUM.

Equation of latus rectum is y=-a => y=-25.



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