已知定义在区间上的函数的图像如图所示,对于满足的任意、,给出

已知定义在区间上的函数的图像如图所示,对于满足的任意,给出下列结论:

其中正确结论的序号是       .(把所有正确结论的序号都填上)     

答案

②③

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