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[" Let "x^(2)=4ky(1)k>0," be a parabola ...

[" Let "x^(2)=4ky_(1)k>0," be a parabola with vertex "A" .Let "BC" be its latus rectum.An ellipse with center on "BC" touches the "],[" parabola at "A" ,and cuts "BC" at points "D" and "D" such that "BD=DB=BC(B,D,E,C" in that order ")" The "],[" eccentricity of the ellipse is "]

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