1.本单元重、难点分析1)不等式的基本性质是推导不等式其它性质的基础,也是证明不等式的依据,贯穿于不等式的证明、求解和实际应用中,因此它是本单元的学习重点.运用不等式的基本性质解决不等式问题时,应注意性质成立的条件.2)不等式证明的主要依据有:i)a-b0 ab;a-b=0 a=b;a- 1. The unit’s heavy and difficult analysis 1) The basic properties of inequality are the basis for deriving other inequalities, and are also the basis for proving inequalities. Throughout the inequalities, the proof, solution and practical application, it is the focus of this unit. When the basic properties of inequality solve the inequality problem, we should pay attention to the condition that the property is established. 2) The main basis of the inequality proof is: i) a-b0 ab; ab=0 a=b;a-