B.ABC.AB的知识精选

已知*A=,B=,则A.AB=                             B.ABC.AB  ...
问题详情:已知*A=,B=,则A.AB=                             B.ABC.AB                             D.AB=R【回答】A【解析】由得,所以,选A.知识点:*与函数的概念题...
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