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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) `- 1/r` (B) `1/r` (C) `2/r` (D) `- 2/r`

A

`-1/r`

B

`1/r`

C

`2/r`

D

`-2/r`

Text Solution

Verified by Experts

The correct Answer is:
C, D
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ARIHANT MATHS-PARABOLA-Exercise (Questions Asked In Previous 13 Years Exam)
  1. A parabola has the origin as its focus and the line x=2 as the directr...

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  2. The tangent PT and the normal PN to the parabola y^2=4ax at a point P...

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  3. Let A and B be two distinct points on the parabola y^2 = 4x. If the ax...

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  4. If two tangents drawn from a point P to the parabola y2 = 4x are at ri...

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  5. Consider the parabola y^2 = 8x. Let Delta1 be the area of the triangle...

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  6. Let (x,y) be any point on the parabola y^2 = 4x. Let P be the point t...

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  7. Let (x,y) be any point on the parabola y^2 = 4x. Let P be the point t...

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  8. The shortest distance between line y-x=1 and curve x=y^2 is

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  9. Let S be the focus of the parabola y^2=8x and let PQ be the common cho...

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  10. Let PQ be a focal chord of the parabola y^(2)=4ax. The tangents to the...

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  11. Let PQ be a focal chord of the parabola y^2 = 4ax The tangents to the ...

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  12. The slope of the line touching the parabolas y^2=4x and x^2=-32y is

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  13. The common tangents to the circle x^2 + y^2 =2 and the parabola y^2 = ...

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  14. Let a, r, s, t be non-zero real numbers. Let P(at^2, 2at), Q, R(ar^2, ...

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  15. Let a, r, s, t be non-zero real numbers. Let P(at^(2),2at),Q(ar^(2),2a...

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  16. Let O be the vertex and Q be any point on the parabola,x^2=""8y . I...

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  17. ·If the normals of the parabola y^2=4x drawn at the end points of it...

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  18. Let the curve C be the mirror image of the parabola y^2 = 4x with resp...

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  19. Let P and Q be distinct points on the parabola y^2 = 2x such that a c...

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  20. Let P be the point on the parabola, y^2=8x which is at a minimum dis...

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