1.

M is the foot of perpendicular from a point P on a parabola y2=4ax to its directrix and SPM is an equilateral triangle, where S is the focus of the parabola. Then the value of SPa is

Answer» M is the foot of perpendicular from a point P on a parabola y2=4ax to its directrix and SPM is an equilateral triangle, where S is the focus of the parabola. Then the value of SPa is


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