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函数是中学数学中的重要概念之一,在通用教材(十年制全日制中学数学课本)中,有关函数的知识是分三次出现的:第一次是在初中三年级《函数及其图象》,这一章中介绍了函数的定义,并对正比例函数、反比例函数、一次函数和二次函数的定义图象和性质进行了具体的研究。第二次是在高中一年级,引进集合与对
The function is one of the important concepts in middle school mathematics. In the general textbook (10-year full-time middle school mathematics textbook), the knowledge of the function is presented in three parts: the first time is in the third grade of junior high school. The definition of the function is introduced in this chapter, and the specific images and properties of the positive ratio function, inverse proportion function, primary function and quadratic function are studied. The second time is in the first grade of high school, introducing collections and pairs