CircleHard

Question

Let A and B be two distinct points on the parabola y2 = 4x. If the axis of the parabola touches a circle of radius r having AB as its diameter, then the slope of the line joining A and B can be

Options

A.
B.
C.
D.

Solution

A = (t12, t1), B = (t22, 2t2)
Centre =
t1 + t2 =
m =

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