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The function f(x)=[(sqrt(x))/(1+x)] ; (w...

The function `f(x)=[(sqrt(x))/(1+x)]` ; (where [ ] denotes the greatest integer function) is
(A) Continuous but non-differentiable for `x>0`
(B) Continuous and differentiable for `x>=0`
(C) Discontinuous exactly at two points for `x>=0`
(D) Non-differentiable exactly at one point for `x>0`

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