The Equation of the directrix to parabola $y^{2} = 8 x$ is _____

$x + 2 = 0$

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$x + 3 = 0$

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$x + 1 = 0$

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$x = 0$

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Solution

The correct option is A
$x + 2 = 0$

In the previous sections, we have already studied how to find the equation of directrix

The Equation of the directrix to parabola $y^{2} = 4 a x$ is $x + a = 0$

For Parabola $y^{2} = 8 x$

$a = 2$

Equation of the directrix is $x + 2 = 0$

Option A is correct.

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