设二阶可导函数[img src="https://img.haodaxue.net/uploadimg/image/20200605/20200605160018_23434.png" alt="" />,则()
A.[img src="https://img.haodaxue.net/uploadimg/ico/2020/0605/1591344074720955.png" />
B.[img src="https://img.haodaxue.net/uploadimg/ico/2020/0605/1591344094857349.png" />
C.[img src="https://img.haodaxue.net/uploadimg/ico/2020/0605/1591344101427451.png" />
D.[img src="https://img.haodaxue.net/uploadimg/ico/2020/0605/1591349167668704.png" />
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正确答案: B 答案分析:img src="https://img.haodaxue.net/uploadimg/image/20200605/20200605172751_32034.png" alt="" />
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