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Directrix of the parabola x^2=-4ay is......

Directrix of the parabola `x^2=-4ay` is.....

A

`x+a=0`

B

`x-a=0`

C

`y-a=0`

D

`y+a=0`

Text Solution

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The correct Answer is:
C
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MAXIMUM PUBLICATION-CONIC SECTIONS-EXAMPLE
  1. Consider the parabola y^2=12x Find the length of the latus rectum.

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  2. Find the foci, vertices, the eccentricity and the length of the latus ...

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  3. Directrix of the parabola x^2=-4ay is.....

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  4. Find the equation of the ellipse whose length of the major axis is 20 ...

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  5. Find the coordinates of the focii,vertices,eccentricity and the length...

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  6. Find the foci,vertices,length of the major axis and eccentricity of th...

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  7. An ellipse whose major axis as x-axis and the centre (0,0) passes thro...

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  8. An ellipse whose major axis as x-axis and the centre (0,0) passes thro...

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  9. Consider the conic find 9y^2-4x^2=36 The foci.

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  10. Consider the conic 9y^2-4x^2=36 find the eccentricity.

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  11. Consider the conic find 9y^2-4x^2=36 Length of latus rectum.

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  12. Find the equation of the circle with centre (2,2) and passing through ...

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  13. Find the eccentricity and the length of latus rectum of the ellipse 4x...

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  14. For the hyperbola 9x^2-16y^2=144 find eccentricity.

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  15. For the hyperbola 9x^2-16y^2=144 find the latus rectum.

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  16. A hyperbola whose transverse axis is x-axis,centre (0,0) and foci (+-s...

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  17. A hyperbola whose transverse axis is x-axis,centre (0,0) and foci (+-s...

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  18. Find the centre and radius of the circle. x^2+y^2-8x+10y-12=0.

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  19. Determine the eccentricity and length of latus rectum of the hyperbola...

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  20. Consider the ellipse x^2/25+y^2/9=1. Find the coordinate of the foci, ...

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