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2 August, 10:06

Which is the equation of a parabola with focus (0, 5) and directrix y = - 5?

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  1. 2 August, 11:15
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    As the focus is at (0,5) it will be symmetrical about the y axis and will open upwards

    General formula is x^2 = 4ay where a is the y coordinate of the focus

    So its y = x^2/5*4

    y = 1/20 x^2
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