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设y=f(x)在(a,6)内有二阶导数,且,f″>0,则曲线y=f(x)在(a,6)内().
分类: 数学1 (军队文职)
发布时间: 2023-11-03 09:28
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设y=f(x)在(a,6)内有二阶导数,且,f″>0,则曲线y=f(x)在(a,6)内().
A.凹
B.凸
C.凹凸性不可确定
D.单调减少
正确答案是A
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