3) What is true about the concavity of f(x)=x3−12x ? a) Concave up when x<0, Concave down when x>0 b) Concave up when −2
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3) What is true about the concavity of f(x)=x3−12x ? a) Concave up when x<0, Concave down when x>0 b) Concave up when −2
3) What is true about the concavity of f(x)=x3−12x ? a) Concave up when x<0, Concave down when x>0 b) Concave up when −2≤x≤0, concave down when x<−2 or x>0 c) Concave up when x>0, Concave down when x<0 d) Concave up for all real values
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