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If x^(2)+y^(2)-4x-6y+k=0 touches x-axis ...

If `x^(2)+y^(2)-4x-6y+k=0` touches x-axis then k=

A

`+-20`

B

`-1,-5`

C

`+-2`

D

`4`

Text Solution

Verified by Experts

The correct Answer is:
D
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AAKASH SERIES-CIRCLES-EXERCISE -I
  1. The intercept made by the circle x^(2)+y^(2)+4x-8y+c=0 on x-axis is 2s...

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  2. The centre of the circle passing through origin and making intercepts ...

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  3. If x^(2)+y^(2)-4x-6y+k=0 touches x-axis then k=

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  4. Statement I: The circle with the points of intersectionof the line 3x+...

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  5. Parametric equation of the circle x^(2)+y^(2)=16 are

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  6. The parametric equations of the circle x^(2)+y^(2)+2x+4y-11=0 are

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  7. If x=3+2cos theta, y=5+2sin theta then the locus of the point (x,y) is...

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  8. Locus of the point (sec h theta, tan h theta) is

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  9. Locus of the point (cos theta +sin theta, cos theta - sin theta) where...

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  10. To the circle x^(2)+y^(2)-8x-4y+4=0 tangent at the point theta=(pi)/4 ...

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  11. The normal at theta of the circle x^(2)+y^(2)=a^(2) is

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  12. The chord of contact of (2,1) w.r.t to the circle x^(2)+y^(2)+4x+4y+1=...

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  13. The chord of contact of (1,2) with respect to the circle x^(2)+y^(2)-4...

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  14. Find the inverse point of (-2,3) with respect to the circle x^(2)+y^(2...

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  15. For all real values of k, the polar of the point (2k, k-4) with respec...

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  16. The polar of (2,3) w.r.t the circle x^(2)+y^(2)-4x-6y+2=0 is

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  17. The polar of the line 8x-2y=11 with respect to the circle 2x^(2)+2y^(2...

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  18. Pole of 3x+5y+17=0 w.r.t the circle x^(2)+y^(2)+4x+6y+9=0 is

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  19. If ax + by + c = 0 is the polar of (1,1) with respect to the circle x^...

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  20. If (1,4), (-2,3) are conjugate points w.r.t x^(2)+y^(2)=k then k=

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