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Let two foci of an ellipse be S(1)(2,3) ...

Let two foci of an ellipse be `S_(1)(2,3)` and `s_(2)(2,7)` and the foot of perpendicular drawn from `S1` upon any tangent to the ellipse be `(-1,1)`. If `e` be the eccentricity of ellipse and `R` be the radius of director circle of auxiliary circle of ellipse, then find the value of `(eR^(2))/(2)`

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