Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Let A and B be two distinct points on the parabola y 2 = 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
A
– 
B
C
D
– 
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(c,d)A(t 12 , 2t 1 ), B (t 22 , 2t 2 )
centre of circle 
⇒ | t 1 + t 2 | = r , slope of AB = 
= ± 
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