f(x)=(x-1)ln(x-1)的单调减区间

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f(x)=(x-1)ln(x-1)的单调减区间

f(x)=(x-1)ln(x-1)的单调减区间
f(x)=(x-1)ln(x-1)的单调减区间

f(x)=(x-1)ln(x-1)的单调减区间
定义域为x>1
f'(x)=ln(x-1)+1
令f'(x)