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数轴是解不等式(组)的重要工具,它是实现数形结合解决数学问题的桥梁,在求解不等式(组)待定字母值时,往往能显示出它的优越性,下面举例加以说明.
Axis is an important tool for solving inequalities (groups), it is a bridge to solve the mathematics problem to solve mathematics problems. When solving the inequality (group) pending letter value, it can often show its superiority. The following examples illustrate.