不等式的证明是不等式部分的重点,也是难点之一。不等式证明的常用方法有:比较法、综合法、分析法、反证法、放缩法等,其中比较法、综合法、分析法是证明不等式最基本的方法,属于高考的必考内容,而利用反证法、放 Inequalities prove inequality part of the focus, but also one of the difficulties. Inequalities to prove the common methods are: comparative method, synthesis method, analysis method, the contradiction method, scaling method, etc., of which comparison method, synthesis method, analysis method is to prove that the most basic method of inequality, belongs to the college entrance examination content, ,put