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The tangent at the point P on the rectan...

The tangent at the point P on the rectangular hyperbola `x y=k^2` with C intersects the coordinate axes at `Qa n dR` . Locus of the circumcentre of triangle `C Q R` is `x^2+y^2=2k^2` (b) `x^2+y^2=k^2` `x y=k^2` (d) None of these

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