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Find lengths of the principal axes, co-o...

Find lengths of the principal axes, co-ordinates of the foci, equations of directrices, length of the latus rectum, distance between foci, distance between directrices of the curve : `16x^2+25y^2=400`

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The correct Answer is:
i) 10,8 ii) `(0, pm 3)` iii) `y= pm (25)/(3)` iv) `(32)/(5)` v) 6 vi) `(50)/(3)`
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