Let . On which open interval is the graph of concave…

MATHEMATICS · Single correct · AP · Calculus AB · Analytical Applications of Differentiation · Analytical Applications of Differentiation

Problem

Let f(x)=x4−4x3f(x)=x^{4}-4x^{3}. On which open interval is the graph of ff concave down? (a) (−∞,0)(-\infty,0) (b) (2,∞)(2,\infty) (c) (0,2)(0,2) (d) (−∞,2)(-\infty,2)

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