Find the equation of the ellipse whose foci are (4,0) and (-4,0), eccentricity =1/3.

Explanation

let the equation of the ellipse is `x^2/a^2 +y^2/b^2=1`

` ae=4` and `e=1/3`


`a=12 ` and `b^2=a^2(1-e^2)`


`b^2=144(1-1/9)`


`b=8sqrt2`
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