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指出错误最有说服力也是最有效的办法莫过于举出反例,反例在中学数学中的应用极为广泛,在教学中若能应用得当,常可达到意想不到的效果.本文就反例在复数教学中的作用谈谈几点看法.1、反例是深化概念,加深理解基础知识的重要手段数学的概念、定理或公式一般都是从正面进行论述的,这往往导致学生机械地、片面地理解概念,对一个新学的定理、公式又往往忽略了其中的关键性词句或对符号意义不
The most persuasive and most effective way to point out the mistake is to cite counterexamples. Counterexamples are extremely widely used in middle school mathematics. If they can be used properly in teaching, they often achieve unexpected results. This article is a counterexample in plural teaching. The role is to talk about a few ideas. 1. The counterexample is an important means to deepen the concept and deepen the understanding of basic knowledge. The mathematical concepts, theorems or formulas are generally discussed from the front, which often leads students to understand the concepts mechanically and unilaterally. For a new theorem and formula, they often ignore the key words or their meaning to the symbol.