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If P is a point such that the ratio of t...

If P is a point such that the ratio of the squares of the lengths of the tangents from P to the circles `x^(2)+y^(2)+2x-2y-20=0` and `x^(2)+y^(2)-4x+2y-44=0` is 2:3, then the locus of P is a circle with centre

A

(7, -8)

B

(-7, 8)

C

(7, 8)

D

(-7, -8)

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The correct Answer is:
B
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  3. 18. The straight lines joining the origin to the points of intersectio...

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  7. Two vertices of an equilateral triangle are (-1,0) and (1, 0), and its...

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  8. If the sum of the coefficient in the expansion of (alpha^2x^2-2alphax+...

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  9. Tangents PT1, and PT2, are drawn from a point P to the circle x^2 +y^2...

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  10. The value of theta in [0, 2pi] so that circle x^(2)+y^(2)+2 (sin alpha...

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  11. The value of alpha in [0,2pi] so that x^(2)+y^(2)+2sqrt(sin alpha )...

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  12. If in a DeltaABC (whose circumcentre is at the origin), a leq sinA ,...

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  13. If P is a point such that the ratio of the squares of the lengths of t...

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  14. If C(1),C(2),C(3),... is a sequence of circles such that C(n+1) is the...

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  15. If r1a n dr2 are the radii of the smallest and the largest circles, re...

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  17. If theta is the angle between the two radii (one to each circle) drawn...

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  18. The number of rational point(s) [a point (a, b) is called rational, if...

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