论文部分内容阅读
一、知识回顾1.不等式的基本性质3:不等式的两边都乘以(或除以)同一个负数,不等号的方向改变.2.解一元一次不等式的一般步骤:(1)去分母;(2)去括号;(3)移项;(4)合并同类项;(5)系数化为1.3.解一元不等式组的一般步骤:(1)求这个不等式组中的各个不等式的解集:(2)找不等式组的解集:由两个一元一次不等式组成的不等式组的解集一般有四种类型
I. Knowledge review 1. Basic properties of inequality 3: Both sides of the inequality are multiplied by (or divided by) the same negative number, and the direction of the inequality sign changes. 2. General steps for solving a one-time inequality: (1) Denominator; (2) (3) Transferring items; (4) Combining similar items; (5) Coefficientization to 1.3. General steps for solving a group of inequalities: (1) Find the solution sets of the inequalities in this inequality group: (2) Finding Solution Sets of Inequality Groups: There are generally four types of solution sets of inequality groups consisting of two unary one-time inequalities.