若函数在区间上的二阶导数非负且零点数目有限,则函数在这个区间上的图像一定是凹的吗 知乎 Template




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tomski若函数在区间上的二阶导数非负且零点数目有限,则函数在这个区间上的图像一定是凹的吗 知乎 coloring