Mathematics

Mathematics

Problem

Let f(x)=x3−6x2+9x+1f(x)=x^{3}-6x^{2}+9x+1. The function ff is increasing on a) (1,3)(1,3) only b) (−∞,1)(-\infty,1) only c) (−∞,1) and (3,∞)(-\infty,1) \text{ and } (3,\infty) d) (1,3) and (3,∞)(1,3) \text{ and } (3,\infty)

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