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在数学教学中从正面阐述法则公式,揭示它们的本质属性,无疑对学生牢固地掌握基础知识是十分必要的,而注意培养学生的逆向思维能力对于巩固,深化所学知识,培养综合运用知识的能力;对于开拓学生的思路,培养创造性的学习能力是颇有益处的。所谓逆向思维指的是,由果索因,知本求源。表现形式则是多方面的,本文仅谈谈某些函数图象的逆用。课本上一般是先介绍某函数的定义,根据其表达式画出图象,然后归纳出函数的性质。如果我们在学生基本掌握函数及其图象的基础上,要求学生由某函
In the teaching of mathematics, formulating the rules and formulas of the front and revealing their essential attributes are undoubtedly necessary for the students to firmly grasp the basic knowledge. Attention should be paid to cultivating the students’ backward thinking ability to consolidate, deepen the knowledge learned, and cultivate the comprehensive use of knowledge. Ability; It is useful to develop students’ ideas and develop creative learning ability. The so-called reverse thinking refers to the fact that the source of knowledge is to know the source. The forms of expression are manifold, and this article only talks about the inverse use of certain functional images. Textbooks generally introduce the definition of a function, draw an image based on its expression, and then generalize the properties of the function. If we are on the basis of the student’s basic mastery of the function and its image, ask the student to write a letter