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对于含绝对值的不等式,教材上给出了如下定义: |x|0)-aa(a>0)x>a或x<-a. 对上述定义,我们拓广到函数中去,可得出下列有关绝对值不等式的定理:
For the inequality with absolute value, the following definitions are given in the textbook: |x|0)-aa(a>0)x>a or x<-a. For the above definition, we broaden into the function to derive the following theorems about absolute value inequality: