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If the equation of the ellipse with foci...

If the equation of the ellipse with foci `(pm4 ,0)` and length of latus rectum `(20)/(3)` is `(x^(2))/(a^(2))+(y^(2))/(b^(2))=1` then `(1)/(2)|a^(2)-b^(2)|` is equal to

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