Q197. The line lx + my + n = 0 is a tangent to the parabola y2 = 4a(x-a) if:Mathematics — Conic Sections — Question 197 of 272A. a(m2 + l2) = lnB. a(l2 - m2) = lnC. a(m2 - l2) = lnD. am2 - al2 = mnPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →