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The values of x for which 1/(1+sqrt(x)),...

The values of x for which `1/(1+sqrt(x)), 1/(1-x), 1/(1-sqrt(x)` are in A.P. lie in the interval (A) `(0,oo)` (B) `(1,oo)` (C) `(0,1)` (D) none of these

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