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If P is a point on the rectangular hyper...

If P is a point on the rectangular hyperbola `x^2-y^2=a^2,C` being the centre and S, S' are two foci , then S.P S'P equals

A

`(CP)^2`

B

`(CS)^2`

C

`("SS"')^2`

D

3

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The correct Answer is:
A
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