高中数学代数与函数一其他练习题138
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不等式 http://picflow.koolearn.com/upload/papers/20140823/20140823143734078559.gif对一切 http://picflow.koolearn.com/upload/papers/20140823/20140823143734093211.gifR恒成立,则实数 a的取值范围是(  )

2021-07-21

A.http://picflow.koolearn.com/upload/papers/20140823/20140823143734125404.gif

B.http://picflow.koolearn.com/upload/papers/20140823/20140823143734140410.gif

C.http://picflow.koolearn.com/upload/papers/20140823/20140823143734125404.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143734187190.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143734140410.gif

D.http://picflow.koolearn.com/upload/papers/20140823/20140823143734218283.gif

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