(08年龙岩一中模拟文)已知函数,给出以下四个命题,其中真命题是

(08年龙岩一中模拟文)已知函数,给出以下四个命题,其中真命题是(   

A.若, 则函数y的值域为 B.在区间上是增函数;

C.直线是函数图象的一条对称轴; 

D.其图象可由的图象按向量=(,0)平移后而得到.

答案

答案:C 

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