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If y = 2x + k " touches " x^(2) + y^(2)...

If ` y = 2x + k " touches " x^(2) + y^(2) - 4x - 2y = 0 ` , then k=

A

`-2,8`

B

`2,-8`

C

`3,-7`

D

`-3,7`

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The correct Answer is:
B
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MARVEL PUBLICATION-CIRCLE AND CONICS -MULTIPLE CHOICE QUESTIONS
  1. If line 3x - y + c = 0 touches circle x^(2) + y^(2) - 2x + 8y - 2...

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  2. Given A -= (2,4) " and " C -= (4,-2) . If Delta ABC is right-angle...

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  3. If y = 2x + k " touches " x^(2) + y^(2) - 4x - 2y = 0 , then k=

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  4. If line x cos alpha + y sin alpha = p " touches circle " x^(2) + y^(...

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  5. If line 4x + 3y + k = 0 " touches circle " 2x^(2) + 2y^(2) = 5x , t...

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  6. Equation of circle which touches line x = y at the origin , and passe...

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  7. If the line (x)/(a) + (y)/(b)= 1 touches the circle x^(2) + y^(2) ...

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  8. Find the equation of the circle which touches both the axes and the ...

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  9. The intercet on the line y = x by the circle x^(2) + y^(2) - 2x = 0 ...

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  10. Find the greatest distance of the point P(10 ,7) from the circle x^2+y...

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  11. Equation of parabola with vertex (0,0) and focus (2,0) is

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  12. Equation of parabola with vertex (0,0) and focus (2,0) is

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  13. Equation of parabola with vertex (0,0) , X-axis as axis of symmetry , ...

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  14. Equation of parabola with focus (0,2) and directrix y + 2 = 0 is

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  15. Equation of parabola with vertex (0,0) Y-axis ax axis of symmetry and...

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  16. Ends of latus-rectum of parabola 3y^(2) = 20 x are

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  17. Enda of latus-rectum of parabola 3x^(2) + 8y = 0 are

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  18. Focal distance and parameter of the point ((1)/(2), 2) on the parabola...

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  19. Focal distance and co-ordinates of the point on the parabola y^(2) = ...

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  20. If line y = x - 8 meets y^(2) = 4x in A and B , then length of interc...

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