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Find equation of the ellipse whose focus is (1,-1), then directrix the line x-y-3=0 and eccentricity `1/2` is

A

`7x^(2)+ 2xy + 7y^(2) - 10 x + 10 y + 7 =0`

B

`7x^(2)+ 2xy + 7y^(2) +7=0`

C

`7x^(2)+ 2xy + 7y^(2) +10x-10y-7-0`

D

none of these

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A
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OBJECTIVE RD SHARMA ENGLISH-ELLIPSE-Exercise
  1. the equation ax^(2)+ 2hxy + by^(2) + 2gx + 2 fy + c=0 represents ...

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  2. Find equation of the ellipse whose focus is (1,-1), then directrix the...

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  3. Find the equation of the ellipse (referred to its axes as the axes ...

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  4. Find the equation to the ellipse (referred to its axes as the axes of ...

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  5. The eccentricity of the ellipse 9x^2+5y^2-30 y=0 is

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  6. If A and B are two fixed points and P is a variable point such that P...

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  7. the length of the latusrectum of the ellipse 3x^(2) + y^(2) = 12 ....

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  8. Find the eccentricity of an ellipse (x^(2))/(a^(2))+(y^(2))/(b^(2))=1 ...

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  9. the eccentricity of an ellipse (x^(2))/(a^(2))+(y^(2))=1 whose l...

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  10. If the focal distance of an end of the minor axis of an ellipse (ref...

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  11. if 2y = x and 3y + 4x=0 are the equations of a pair of conjuga...

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  12. if theta is a parameter then x=a ( sin theta + cos theta), y...

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  13. The distance from the foci of P (x(1), y(1)) on the ellipse x^2/9+y^2/...

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  14. Find the equation for the ellipse that satisfies the given conditions...

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  15. The eccentricity of the curve x^(2)-4x+4y^(2)=12 is

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  16. The parametric representation of a point on the ellipse whose foci are...

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  17. if S and S are two foci of an ellipse (x^(2))/(a^(2))+(y^(2))/(b^...

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  18. The eccentricity of the ellipse represented by 25 x^2+16 y^2-150 x-175...

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  19. the length of the latusrectum of the ellipse 5x^(2) + 9x^(2)=45...

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  20. The equation of the passing through the of the ellipse (x^(2))/(16)+(y...

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