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已知函数f(x)在实数集R上具有下列性质:①f(x+1)是偶函数,②f(x+2)...
已知函数f(x)在实数集R上具有下列性质:①f(x+1)是偶函数,②f(x+2)=-f(x),③当1≤x1<x2≤3时,(f(x2)-f(x1))•(x2-x1)<0,则f(2011)、f(2012)、f(2013)的大小关系为( )
A.f(2011)>f(2012)>f(2013)
B.f(2012)>f(2011)>f(2013)
C.f(2013)>f(2011)>f(2012)
D.f(2013)>f(2012)>f(2011)
考点分析:
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