f(X)=ax³-2ax²+b求单调区间
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f(X)=ax³-2ax²+b求单调区间
f(X)=ax³-2ax²+b求单调区间
f(X)=ax³-2ax²+b求单调区间
f'(x)=3ax^2-4ax=ax(3x-4)
若a0,则f(x)的单调递增区间是(-无穷,0)和(4/3,+无穷)、递减区间是(0,4/3).