函数知识是中学数学的核心内容,函数是研究事物的变化规律的一个重要模型.函数教学是初中数学教学的重点和难点,它引入了函数思想,融合了方程思想和数形结合等初中数学的重要思想,沟通了代数和几何知识,是高中函数、三角与解析几何的基础,更 Function knowledge is the core content of the middle school mathematics, and the function is an important model to study the changing law of things.Function teaching is the key and difficult point of junior high school mathematics teaching. It introduces the function thought, integrates the middle school mathematics Important thought, communicate algebra and geometry knowledge, is the basis of high school function, triangle and analytic geometry, more