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The line segment joining the foci of the...

The line segment joining the foci of the hyperbola `x^2 – y^2 +1 = 0` is one of thediameters of a circle. The equation of the circle is

A

`x ^(2) + y^(2) =4`

B

`x ^(2) + y ^(2) = sqrt2`

C

`x ^(2) + y ^(2) =2`

D

`x ^(2) + y ^(2) = 2 sqrt2`

Text Solution

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The correct Answer is:
C
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