高中数学代数与函数一其他练习题79
题目内容

http://picflow.koolearn.com/upload/papers/20140823/20140823231021840869.png已知 http://picflow.koolearn.com/upload/papers/20140823/20140823231021887447.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823231022043391.png时取得极值,则 http://picflow.koolearn.com/upload/papers/20140823/20140823231022246278.png等于(  )

2021-07-15

A.2

B.3

C.4

D.5

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