Focus and directrix of the parabola x 2-8 ay areA- 0-2 a and y -2 aB- 0-2 a and y-2 aC- -2 a- 0 and x-2 aD- 2 a - 0 and x -2 a

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Four Common Forms of Parabola Equation

Focus and dir...

Question

Focus and directrix of the parabola $x^{2} = - 8 a y$ are

(0, -2a) and y = 2a

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(0, 2a) and y = - 2a

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(2a, 0)and x = - 2a

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(-2a, 0) and x = 2a

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Similar questions

The quadratic polynomial in x whose zeros are -a and 2a is:

(2, 2)

x

y

α units

β units

A

α

β

α > 0, β > 0

How many of the following statements are correct?

(a) The focus of $x^{2} = 4 a y$ is (0, a)

(b) The directrix of $y^{2} = - 4 a x$ is x + a = 0

(d) The parabolas $x^{2} = 4 a y$ and $y^{2} = 4 a x$ are equal.

x + a = 0, y - a = 0, x + y + a = 0

x

(- 2 a, - 2 a)

2 a + \frac{1}{2 a}

a \neq

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