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Let A and B be two distinct points on th...

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 find the slope of the line joining A and B .

A

`-(1)/(r )`

B

`(1)/(r )`

C

`(2)/(r )`

D

`-(2)/(r )`

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The correct Answer is:
C, D
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