方程与不等式是初中代数中非常重要的内容,历届中考也多有涉及,由于部分学生对基础知识和基本方法理解掌握不够,不能灵活运用,解题时常出现各种各样的错误,甚至错了还找不到错误的原因。 解方程与解不等式的问题,实际上就是求函数值等于、大于或小于某常数时自变量的取 The equations and inequalities are very important contents in junior high school algebra. Previous examinations have also been involved. Because some students have insufficient understanding of basic knowledge and basic methods, they can not be flexibly used. Problems often appear in solving problems, even wrong. Can’t find the cause of the error. The problem of solving equations and solving inequalities is actually to find the arguments when the function value is equal to, greater than, or less than a certain constant.