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对于函数 http://picflow.koolearn.com/upload/papers/20140823/20140823130319395510.gif,给出下列四个命题:① http://picflow.koolearn.com/upload/papers/20140823/20140823130319411270.gif是增函数,无极值;② http://picflow.koolearn.com/upload/papers/20140823/20140823130319411270.gif是减函数,有极值;③ http://picflow.koolearn.com/upload/papers/20140823/20140823130319411270.gif在区间 http://picflow.koolearn.com/upload/papers/20140823/20140823130319520416.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823130319536410.gif上是增函数;④ http://picflow.koolearn.com/upload/papers/20140823/20140823130319411270.gif有极大值为 http://picflow.koolearn.com/upload/papers/20140823/20140823130319598197.gif,极小值 http://picflow.koolearn.com/upload/papers/20140823/20140823130319629201.gif;其中正确命题的个数为(    )

发布时间:2021-07-16

A.http://picflow.koolearn.com/upload/papers/20140823/20140823130319676134.gif

B.http://picflow.koolearn.com/upload/papers/20140823/20140823130319785190.gifhttp://picflow.koolearn.com/upload/papers/20140823/2014082313031986373.gif

C.http://picflow.koolearn.com/upload/papers/20140823/20140823130319988187.gif

D.http://picflow.koolearn.com/upload/papers/20140823/20140823130320004138.gif

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