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If x^(2)+y^(2)+6x+2ky+25=0 to touch y-ax...

If `x^(2)+y^(2)+6x+2ky+25=0` to touch y-axis then k=

A

`+-20`

B

`-1,-5`

C

`+-5`

D

`4`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-CIRCLES-PRACTICE EXERCISE
  1. The x intercept of the circle x^(2)+y^(2)+8x-9=0 is

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  2. x^(2)+y^(2)-14x-10y+24=0 makes an

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  3. If x^(2)+y^(2)+6x+2ky+25=0 to touch y-axis then k=

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  4. A circle passes through (-2,4) and touches the y-axis at (0,2). Which ...

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  5. If I(1),I(2),I(3) are the intercept on x-axis, y-axis, y=x w.r.t x^(2)...

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  6. If a circle of radius 4 touches x-axis at (2,0) then its centre may be

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  7. The equation of the circle touching the coordinate axes the line x+2=0...

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  8. Two circles touching both the axes intersect at (3,-2) then the coordi...

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  9. If two circles touching both the axes intersect at two points P and Q ...

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  10. The equation of the circle passing through (2,1) and touching the coor...

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  11. The radius of the circle of least size that passes through (-2,1) and ...

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  12. The equation of the circle which touches both the axes and the line 4x...

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  13. Equation of circle which touch X-axies at (3,0) and making Y-intercept...

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  14. The equation of the circles which touch the y-axis at the origin and t...

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  15. The circle passing through origin and making intercepts 6 and -4 onx a...

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  16. The equation to the cicle of radius 5. which pass through the two poin...

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  17. The centre of the circle touching y-axis at (0,4) and making an interc...

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  18. The chord of contact of (2,1) with respect to the circle x^(2)+y^(2)=2...

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  19. The polar of (3,-1) w.r.t the circle x^(2)+y^(2)2x-4y+1=0 is

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  20. The pole of 2x+3y=0 with respect to x^(2)+y^(2)+6x-4y=0 is

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