不等式的证明历来是中学数学的难点,这是因为不等式中常常涉及分析、组合、凑配、放缩等技巧性变形,既有一定的难度而又较为灵活,没有固定的模式可循;別是不等式的有关知识的掌握,直接影响着对高等数学的学习。因此,不等式就成了各类考试尤其是某些竞赛命 The inequality proved to be a difficulty in middle school mathematics. This is because inequalities often involve skillful transformations such as analysis, composition, fitting, and scaling. There are certain difficulties and flexibility, and there is no fixed pattern to follow; The mastery of knowledge about inequalities directly affects the study of advanced mathematics. Therefore, inequality has become an examination of all kinds, especially certain competitions.