高中数学代数与函数一其他练习题86
题目内容

若函数 http://picflow.koolearn.com/upload/papers/20140823/20140823163409255798.gifhttp://picflow.koolearn.com/upload/papers/20140823/2014082316340925572.gif导函数 http://picflow.koolearn.com/upload/papers/20140823/20140823163409270412.gif在区间(-∞,4] 上是减函数,则实数 http://picflow.koolearn.com/upload/papers/20140823/20140823163409286192.gif的取值范围是(    )

2021-07-16

A.http://picflow.koolearn.com/upload/papers/20140823/20140823163409302407.gif

B.http://picflow.koolearn.com/upload/papers/20140823/20140823163409317404.gif

C.http://picflow.koolearn.com/upload/papers/20140823/20140823163409333418.gif

D.http://picflow.koolearn.com/upload/papers/20140823/20140823163409364409.gif

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