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The co-ordinates of the foci and the ecc...

The co-ordinates of the foci and the eccentricity of the ellipse `x^2/49+y^2/9=1` are :

A

`(+-3sqrt10,0),(2sqrt10)/7`

B

`(+-2sqrt10,0),sqrt10/7`

C

`(+-3sqrt10,0),sqrt10/7`

D

`(+-2sqrt10,0),(2sqrt10)/7`

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