| 1. | Substitution of variable is a method of solving extreme value and maximum of a function , which can simplify the problem , but is subject to making mistakes , about this discussion is made and a few results are given in the paper
摘要变量代换法是求函数极值与最值的方法之一，它可使问题简化，但也容易导致错误，本文对此进行了探讨，并给出了几个结论。 |
