The special role of counterexamples in mathematics theory is discussed. Several special examples used in teaching differential of multi-function are given.
讨论了反例在数学理论中的特殊作用，并给出了几个在多元函数微分学教学中应用的特例。
There are some examples in solving mathematics problems in this article. And it offers some teaching countermeasures to strengthen return thought.
在此介绍了化归思想在数学解题中的几个应用，并提出了加强化归思维的教学对策。
应用推荐