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If the focus of a parabola is at (0, -3)...

If the focus of a parabola is at (0, -3) and its directrix is y = 3, then its equation is

A

`x^(2)=-12y`

B

`x^(2)=12y`

C

`y^(2)=-12y`

D

`y^(2)=12x`

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The correct Answer is:
a
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