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If the circles x^2+y^2-9=0 and x^2+y^2+2...

If the circles `x^2+y^2-9=0` and `x^2+y^2+2alphax+2y+1=0` touch each other, then `alpha` is `(a) -4/3` (b) 0 (c) 1 (d) `4/3`

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CENGAGE PUBLICATION-CONIC SECTIONS-All Questions
  1. The equation of the tangent to the circle x^2+y^2=25 passing through (...

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  2. If the area of the quadrilateral by the tangents from the origin to th...

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  3. If the circles x^2+y^2-9=0 and x^2+y^2+2alphax+2y+1=0 touch each other...

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  4. Point M moved on the circle (x - 4)^2 + (y - 8)^2 = 20 Then it broke a...

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  5. The points on the line x=2 from which the tangents drawn to the circl...

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  6. Co-ordinates of the centre of a circle, whose radius is 2 unit and whi...

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  7. Three sides of a triangle have the equation Li = y - mi x = 0 , I = 1,...

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  8. If the equation x^2+y^2+2h x y+2gx+2fy+c=0 represents a circle, then t...

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  9. Consider two circles x^2+y^2-4x-6y-8=0 and x^2+y^2-2x-3=0 Statement 1...

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  10. Statement-1: The point (sin alpha, cos alpha) does not lie outside the...

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  11. The equation of the circle which touches the axes of coordinates and ...

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  12. The equations of tangents to the circle x^2+y^2-6x-6y+9=0 drawn from t...

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  13. Statement 1 : Two orthogonal circles intersect to generate a common ...

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  14. Two circles C1a n dC2 both pass through the points A(1,2)a n dE(2,1) a...

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  15. A circle C1 of radius b touches the circle x^2 + y^2 =a^2 externally a...

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  16. If a circle passes through the point (a, b) and cuts the circle x^2+y^...

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  17. Difference in the values of the radius of a circle whose center is at ...

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  18. A triangle is inscribed in a circle of radius 1. The distance between ...

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  19. Find the equation of the circle whose radius is 5 and which touches th...

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  20. Let 2 x^2 + y^2 - 3xy = 0 be the equation of pair of tangents drawn fr...

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