高中数学代数与函数一其他练习题129
题目内容

如果不等式 http://picflow.koolearn.com/upload/papers/20140823/20140823155901769739.gif对一切实数x均成立,则实数m的取值范围是( )

2021-07-20

A.(1,3)

B.(-http://picflow.koolearn.com/upload/papers/20140823/20140823155901785192.gif,3)

C.(-http://picflow.koolearn.com/upload/papers/20140823/20140823155901785192.gif,1)http://picflow.koolearn.com/upload/papers/20140823/20140823155901832200.gif(2,+http://picflow.koolearn.com/upload/papers/20140823/20140823155901785192.gif

D.(-http://picflow.koolearn.com/upload/papers/20140823/20140823155901785192.gif+http://picflow.koolearn.com/upload/papers/20140823/20140823155901785192.gif)

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