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If f(x) is a differentiable real valued ...

If `f(x)` is a differentiable real valued function such that `f(0)=0` and `f\'(x)+2f(x) le 1`, then (A) `f(x) gt 1/2` (B) `f(x) ge 0` (C) `f(x) le 1/2` (D) none of these

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