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If the sum of the slopes of the normal f...

If the sum of the slopes of the normal from a point `P` to the hyperbola `x y=c^2` is equal to `lambda(lambda in R^+)` , then the locus of point `P` is (a)`x^2=lambdac^2` (b) `y^2=lambdac^2` (c)`x y=lambdac^2` (d) none of these

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