已知函数f(x)=|x-1|+|x-a|.若不等式f(x)≥a恒成立,求

已知函数fx)=|x1|+|xa|.若不等式fx)≥a恒成立,求实数a的取值范围.

答案

由不等式的性质得:,要使不等式恒成立,则只要,解得:,所以实数的取值范围为  4

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