利用数轴来确定一元一次不等式组的解集,就是数形结合思想的具体运用.在确定一元一次不等式组的解集时,若用数轴来帮助找解集,便于同学们接受理解,并能直观完美、准确无误地找到解集.当一元一次不等式组中有字母参数的时候,利用数轴解决问题更直观、更准确.利用数轴来确定一元一次不等式组的解集常有以下步骤:第一步,分别求出不等式组中每个不等 The use of the number of axes to determine the unary set of inequality sets is the concrete use of the combination of number and shape.In the process of determining the set of unary inequality sets, if the number of axes is used to help solve the set, it is easier for the students to understand and intuitively Perfect and accurate find the solution set.When there are letter parameters in the unary inequality group, it is more intuitive and more accurate to solve the problem by using the number axis.Using several axes to determine the solution set of unary inequality group often has the following steps: Step 1 , Find each inequality group each unequal