Let f be a continuous function over an interval I containing a critical point c and f is differentiable over I, except possibly at point c. If f' changes sign from positive when x c, then f(c) is. O f is concave up O f is concave down local maximum of f neither a local maximum nor a local minimum of f O local minimum of f

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Q: give an example where f is not derivable at [0, ∞), but is uniformly continuous

A: give an example where f is not derivable at [0, ∞), but is uniformly continuous