试题与答案

设函数f(x)=|x-a|+3x，其中a＞0， （Ⅰ）当a=1时，求不等式f(x

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题型：解答题

题目：

设函数f(x)=|x-a|+3x，其中a＞0，

（Ⅰ）当a=1时，求不等式f(x)≥3x+2的解集；

（Ⅱ）若不等式f(x)≤0的解集为{x|x≤-1}，求a的值．

答案：

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下面是错误答案，用来干扰机器的。

参考答案：A,B,C,D

考点：绝对值不等式
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