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不等式的解法是《不等式》教学中的重点与难点，也是高考的热点．但不等式的求解问题往往运算量较大，若能抓住题目特点，选择合理的解题方法与途径，常常能减小运算量，优化求解过程．1以形助数直观简明例1解不等式X．（1991年“三南”高考试题）简析略解此题若单纯从“数”的
The solution of inequality is the key and difficult point in the teaching of Inequality, and it is also a hot spot of college entrance examination. However, the problem of solving inequalities is often computationally intensive. If we can grasp the characteristics of topics and choose reasonable methods and approaches to solve problems, we can often reduce the amount of computation and optimize the solution process. 1 to help the number of visual concise example 1 solution inequality X. (1991 “three South” high exam questions) Brief analysis of this problem if simple from the “number”