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Abscissas of two points P and Q are root...

Abscissas of two points P and Q are roots of the equation ` x^(2) + 2x - 3 =0 ` while their ordinates are roots of `y^(2) + 4y - 12 = 0 ` . The centre of the circle with PQ as a diameter is

A

`(-1,-2)`

B

(1,2)

C

(1,-2)

D

`(-1,2)`

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The correct Answer is:
A
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MARVEL PUBLICATION-CIRCLE AND CONICS -MULTIPLE CHOICE QUESTIONS
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  4. The radius of the circle sqrt(1 + a^(2)) (x^(2) + y^(2)) - 2bx - 2...

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  5. If line 3x - y + c = 0 touches circle x^(2) + y^(2) - 2x + 8y - 2...

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

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

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

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

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

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

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

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

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

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

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

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

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