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下列函数中,最小值是2的是

发布时间:2021-07-21

A.http://picflow.koolearn.com/upload/papers/g02/20110524/20110524105712658988.gif

B.http://picflow.koolearn.com/upload/papers/g02/20110524/201105241057126901206.gif

C.http://picflow.koolearn.com/upload/papers/g02/20110524/20110524105712705972.gif

D.http://picflow.koolearn.com/upload/papers/g02/20110524/201105241057127051174.gif

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