一、为什么要学习不等式在数量关系中，总存在着不等和相等两种关系．不等表示事物的运动，相等表示事物的平衡，量的不等是普遍的，绝对的．一元一次不等式是表示不等关系的最基本的形式，又是学习其他不等式的基础，不少数学问题以及一些物理、化学问题都要用到不等式的知识 First, why do we have to learn inequalities in the number of relations, there are always unequal and equal relations between the two. The movement of things is not equal, the balance of things is equal, and the amount is not universal. Absolute. One-time inequality is the most basic form of inequality, and it is the basis for learning other inequalities. Many mathematical problems and some physical and chemical problems require the use of inequality knowledge.