fx=x³-x²-x的单调区间,fx=2x+4的单调区间
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fx=x³-x²-x的单调区间,fx=2x+4的单调区间
fx=x³-x²-x的单调区间,fx=2x+4的单调区间
fx=x³-x²-x的单调区间,fx=2x+4的单调区间
f'(x)=3x²-2x-1,f'(x)=0 ,3x²-2x-1=0=(3x+1)(x-1) ,x1=-1/3,x2=1
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