设函数f(x)=-1/3x^3+2ax^2-3a^2x+a(a∈R).求函数f(x)的单调区间和极值
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设函数f(x)=-1/3x^3+2ax^2-3a^2x+a(a∈R).求函数f(x)的单调区间和极值设函数f(x)=-1/3x^3+2ax^2-3a^2x+a(a∈R).求函数f(x)的单调区间和极值
设函数f(x)=-1/3x^3+2ax^2-3a^2x+a(a∈R).求函数f(x)的单调区间和极值
设函数f(x)=-1/3x^3+2ax^2-3a^2x+a(a∈R).求函数f(x)的单调区间和极值
设函数f(x)=-1/3x^3+2ax^2-3a^2x+a(a∈R).求函数f(x)的单调区间和极值
高次利用求导求函数的单调性:
(f(x))'=-x^2+4ax-3a^2
令(f(x))'=0 解得x=3a或x=a
所以当x=3a,x=a时,f(x)可取得极值 f(a)=-4/3a^3+a
当x
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