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1.已知函数 ,其中以4为最小值的函数个数是( ) A.0 B.1 C.2 D....

1.已知函数6ec8aac122bd4f6e

6ec8aac122bd4f6e,其中以4为最小值的函数个数是(    )

A.0                        B.1                         C.2                         D.3

 

A 【解析】略
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