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AP EAMCET20228 Jul 2022Evening ShiftMathematicsParabolaActual

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

Options

  1. Ax^2=12 y
  2. By^2=-12 x
  3. Cy^2=12 x
  4. Dx^2=-12 y

Correct answer

D. x^2=-12 y

Step-by-step solution

This is of the form of x^2=-4 a y Here, S (0,-a) (0,-3) Thus, a=3 Equation of parabola is x^2=-4 3 y x^2=-12 y

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