一元一次不等式组是中学数学中的一个很基本但不容易掌握的内容,它的常用解法有数轴法和口诀法.笔者通过深入研究,总结出另一种创新解法——观解法.下面举例说明三种方法在解题中的应用.例1解一元一次不等式组(?)解法1(数轴法):由x+3>4x得x<1,由4x-3≤5x-1得x≥-2,将x<1与x≥-2在数轴上表示(如图1). The unitary inequality group is a very basic but not easy to grasp content in the middle school mathematics, and its common solution is the axiomatic method and the dictation method.After further research, the author sums up another innovative solution - the concept solution method. Example 1 Solve the unary inequality group (?) Solution 1 (number axis method): x <1 by x + 3> 4x and x≥- by 4x-3≤5x-1 2, x <1 and x≥-2 on the number of axes (Figure 1).