高中数学代数与函数一其他练习题138
题目内容

不等式 http://picflow.koolearn.com/upload/papers/20140823/20140823151305837491.gif的解集为R,则 http://picflow.koolearn.com/upload/papers/20140823/20140823151305853192.gif的取值范围是(     )

2021-07-21

A.http://picflow.koolearn.com/upload/papers/20140823/20140823151305868331.gif

B.http://picflow.koolearn.com/upload/papers/20140823/20140823151305899274.gif

C.http://picflow.koolearn.com/upload/papers/20140823/20140823151305931330.gif

D.http://picflow.koolearn.com/upload/papers/20140823/20140823151305946246.gif

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