Question: Suppose that f'(x)>0 on (-,-1),f'(x) <0 on (-1,1), and f'(x)>0 on (1,). Which of the following functions could be f?(A)f(x)=x2-2x(B)f(x)=x3-3x(C)f(x)=x22x(D)f(x)=x4-4x(E)f(x)=x33x

Suppose that f'(x)>0 on (-,-1),f'(x)<0 on (-1,1), and f'(x)>0 on (1,). Which of the following functions could be f?(A)f(x)=x2-2x(B)f(x)=x3-3x(C)f(x)=x22x(D)f(x)=x4-4x(E)f(x)=x33x

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