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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/sqrt2`

B

1/2

C

`sqrt3/2`

D

1/3

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The correct Answer is:
A
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