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Find the equation of the ellipse, whose ...

Find the equation of the ellipse, whose length of the major axis is 20 and foci are `(0,+-5)`.

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Equation of ellipse can be given as
`x^2/a^2+y^2/b^2 = 1`
Here, Foci of ellipse `= (0+-5)`
This mean, the major axis is Y-axis and `c = 5`.
Length of major axis ` = 20`
`=> 2b = 20=> b = 10`
...
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