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Let S and s' be the foci of an elli...

Let S and s' be the foci of an ellipse and B be one end of its minor axis . If SBS' is a isosceles right angled triangle then the eccentricity of the ellipse is

A

`1/(sqrt(2))`

B

`1/2`

C

`(sqrt(3))/(2)`

D

`1/3`

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A
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