. AB is a chord of the parabola y^2 =4ax
AB is a chord of the parabola y2 =4ax. If its equation is y = mx + C and it subtends a right angle at the vertex of the parabola then
(A) c = 4am
(B) a = 4mc
(C) c = -4am
(D) a + 4mc
Best Answer
Correct Answer:
(C) c = -4am
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