Question

Find the coordinates of the focus axis of the parabola, the equation of directrix and the length of the latus rectum for the parabola .

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Solution
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The given equation is
Here, the coefficient of is negative.
Hence the parabola opens downwards.
On comparing this equation with  


 Coordinates of the focus
Axis of the parabola is the -axis i.e
Equation of directrix   i.e.,
Length of latus rectum

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