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若a,b∈R+,ab-(a+b)=1,则a+b的最小值是

发布时间:2021-07-21

A.2http://picflow.koolearn.com/upload/papers/g02/20110813/20110813112343468942.gif+2

B.http://picflow.koolearn.com/upload/papers/g02/20110813/20110813112343500939.gif+2

C.2http://picflow.koolearn.com/upload/papers/g02/20110813/20110813112343500942.gif-2

D.2http://picflow.koolearn.com/upload/papers/g02/20110813/20110813112343531942.gif

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