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The equation of the directrix of the par...

The equation of the directrix of the parabola `x^2 = 28y = 0` is

A

`y - 7 = 0`

B

`y + 7 = 0`

C

`x - 7 = 0`

D

`x + 7 = 0`

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The correct Answer is:
A
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NEW JOYTHI PUBLICATION-CONIC SECTIONS -EXERCISE - PARABOLA
  1. The vertex of the parabola y^2 + 4x = 0 is

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  2. The focus of the parabola y^2 = 20 x is

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  3. The axis of the parabola y^2 = x is the line

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  4. The latus rectum of the parabola y^2 = 11x is of length

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  5. If (3,0) is the focus and y axis is the tangent at vertex. Then the eq...

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  6. If the parabola y^2 = ax passes through (3,2) then the focus is

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  7. Equation of the parabola with focus (-4,0) and vertex at the origin is

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  8. The equation of the directrix of the parabola x^2 = 28y = 0 is

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  9. The vertex of the parabola y^2 = 4x + 4y is

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  10. The focus of the parabola 4y^2 + 12x - 12y + 39 = 0 is

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  11. Axis of the parabola x^2 - 3y - 6x + 6 = 0 is

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  12. The equation of the parabola with vertex at (0,0) , axis along y axis ...

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  13. The length of latus rectum of the parabola 4y^2 + 2x - 20y + 17 = 0 is

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  14. The length of the latus rectum of the parabola x^2 - 4x - 8y + 12 = 0 ...

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  15. The equation of the directrix of the parabola y^2 + 4y + 4x + 2 = 0 is

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  16. The equation of the parabola with its vertex at (1,1) and focus at (3,...

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  17. Equation of the parabola with focus (3,0) and the directrix x + 3 = 0 ...

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  18. If (0,6) and (0,3) are respectively the vertex and focus of a parabola...

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  19. The line x - y + 2 = 0 touches the parabola y^2 = 8x at the point

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