高中数学代数与函数一其他练习题79
题目内容

已知二次函数 http://picflow.koolearn.com/upload/papers/20140824/20140824012241365447.png= http://picflow.koolearn.com/upload/papers/20140824/20140824012241381591.png的导数为 http://picflow.koolearn.com/upload/papers/20140824/20140824012241396481.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824012241412464.png>0,对任意实数 http://picflow.koolearn.com/upload/papers/20140824/20140824012241412266.png都有 http://picflow.koolearn.com/upload/papers/20140824/20140824012241365447.png≥0,则 http://picflow.koolearn.com/upload/papers/20140824/20140824012241459626.png的最小值为(   )

2021-07-15

A.4

B.3

C.8

D.2

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