题目内容

若函数f(x)对于任意的x都有f (x+2)=f (x+1)-f (x)且f (1)=lg3-lg2f (2)=lg3+lg5,则f (2010)=                                                                                           (    )

      A.1                         B.-2                     C.lg3-lg2                              D.-1

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