设函数f(x)=|x+a|+|x-a|.
(1)当a=1时,解不等式f(x)≥4;
(2)若f(x)≥6在x∈R上恒成立,求a的取值范围.
(1)当a=1时,解不等式f(x)≥4;
(2)若f(x)≥6在x∈R上恒成立,求a的取值范围.
更新时间:2018-07-14 11:11:30
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