高中数学代数与函数一其他练习题123
题目内容

http://picflow.koolearn.com/upload/papers/20140824/20140824003420852405.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/20140824003420867995.png,目标函数 http://picflow.koolearn.com/upload/papers/20140824/20140824003420883610.png仅在点 http://picflow.koolearn.com/upload/papers/20140824/20140824003420899379.png处取得小值,则 k的取值范围为

2021-07-20

A.(-1,2)

B.(-4,2)

C.(-4,0]

D.(-2,4)

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