SOLUTION: write the equation of conic with eccentricity e,focus(a,0) and directrix y-axis ?

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Question 1016625: write the equation of conic with eccentricity e,focus(a,0) and directrix y-axis ?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
It is a parabola, concave right, with the vertex at (a/2, 0) and equation
x = (1/2a)y^2 + a/2