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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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MOTION-PARABOLA-EXERCISE - IV
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  3. Consider the circle x^2 + y^2 = 9 and the parabola y^2 = 8x. They inte...

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  4. Consider the circle x^2 + y^2 = 9 and the parabola y^2 = 8x. They inte...

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  5. Consider the circle x^2 + y^2 = 9 and the parabola y^2 = 8x. They inte...

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  6. The tangent and normal at P(t), for all real positive t, to the parabo...

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

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  8. Consider the parabola y^(2) = 8x. Let Delta(1) be the area of the tria...

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

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  10. Let L be a normal to the parabola y^(2) = 4x. If L passes through 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. Let PQ be a focal chord of the parabola y^(2) = 4ax. The tangents to t...

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  13. line L:y=mx+3 meets y–axis at E(0, 3) and the are of the parabola y^(2...

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

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

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  16. If st = 1, then the tangent at P and the normal at S to the parabola m...

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  17. Let P and Q be distinct points on the parabola y^(2) = 2x such that a ...

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  18. The circle C(1) : x^(2)+y6(2)=3, with cenre at O, intersects the parab...

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  19. Let P be the point on the parabola y^(2) = 4x which is at the shortest...

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  20. If a chord, which is not a tangent, of the parabola y^(2)=16x has the ...

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