证明不等式和证明恒等式一样有多种方法,诸如分析法、综合法、比较法、反证法、数学归纳法等,但不论哪种方法都离不开放缩的方法,因为不等式表示的是两个量的不相等关系.对于不等式A>B,从左向右是缩小的.而从右向左则是放大的.证明不等式的一个重要途径就是把不等式的一边通过若干次的恒等变形和至少一次的不等变形(放大或缩小),根据等式和不大光明 There are many ways to prove inequality and prove identity, such as analysis method, synthesis method, comparison method, anti-evidence method, mathematical induction method, etc., but no matter which method is not open shrink method, because the inequality represents two quantities. Unequal relations. For the inequality A>B, it is reduced from left to right. From right to left is an enlargement. An important way to prove the inequality is to pass one side of the inequality through several times of constant deformation and at least one Unequal deformation (enlarged or reduced), according to the equation and not much light