高中数学代数与函数一其他练习题138
题目内容

在R上定义运算 http://picflow.koolearn.com/upload/papers/20140823/20140823160736523209.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823160736539195.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823160736523209.gify= http://picflow.koolearn.com/upload/papers/20140823/20140823160736539195.gif(2—y),若不等式 http://picflow.koolearn.com/upload/papers/20140823/20140823160736539195.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823160736523209.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823160736539195.gif+a)<1对任意实数 http://picflow.koolearn.com/upload/papers/20140823/20140823160736539195.gif都成立则( )

2021-07-21

A.-1<a<1

B.0<a<2

C.0<a<4

D.2<a<4

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