已知函数f(x)=x的3次方-3ax-1,a=0 (1)求f(x)的单调区间; (2)若f(x)在x=-1处取得极值,直线y=m已知函数f(x)=x的3次方-3ax-1,a不等于0 (1)求f(x)的单调区间;(2)若f(x)在x=-1处取
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