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含有参数的绝对值不等式都有一定的难度,需要对参数进行合理的分类讨论,在讨论过程中运算较复杂.如果采用数形结合的方法,可以使难度大大降低,变抽象为直观.平时做题时要注意数形结合思想的运用.
Absolute value inequality with parameters has a certain degree of difficulty. It is necessary to classify and discuss the parameters rationally. In the discussion process, the calculation is more complicated. If the combination of number and shape is used, the difficulty can be greatly reduced and the abstraction becomes intuitive. Questions should pay attention to the use of digital ideas.