則,1
已知函數(shù)f(x)=-x^3+6x^2-9x+m,求f（x）的單調(diào)增區(qū)間
已知函數(shù)f(x)=-x^3+6x^2-9x+m,求f（x）的單調(diào)增區(qū)間
數(shù)學人氣：938 ℃時間：2019-08-21 10:50:25
優(yōu)質(zhì)解答
令f(x)'=-3x^2 + 12x -9=-3(x-3)(x-1)>0
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