Q71. The equation x2 + k2xy + k1y2 = 0 represents a pair of mutually perpendicular lines if:Mathematics — Analytic Geometry — Question 71 of 217A. k1 = -1B. k1 = 2k2C. 2k1 = k2D. 2k1 = -k2Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →