2. Given f(x)=√x, describe the concavity of f(x). A. concavity cannot be determined B. concave up for all x, except.x=0 C. D. concave down for x < 0 and concave up for x>0 concave up for x<0 and concave down for x > 0 E. concave down for all x, except.x=0

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