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The equation of the parabola whose verte...

The equation of the parabola whose vertex and focus lie on the axis of `x` at distances `a` and `a_1` from the origin, respectively, is `y^2-4(a_1-a)x` `y^2-4(a_1-a)(x-a)` `y^2-4(a_1-a)(x-a)1)` `non eoft h e s e`

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