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指数函数是学习函数的概念、图象与性质后遇到的第一个基本初等函数,所以在知识与方法上要发挥承上启下的作用,一方面要探究指数函数的图象与性质,是对前面学习内容的具体实践;另一方面要通过实践建构研究函数的一般方法,为后面其他函数的研究奠定基础。在课堂教学中,让学生自主构建,感受指数函数的图象与性质,生成自己对指数函数的理解。
Exponential function is the first basic elementary function encountered after learning the concept, image and nature of the function. Therefore, it plays an important role in the knowledge and method. On the one hand, to explore the image and nature of the exponential function, Learn the concrete practice of the content; on the other hand, we should lay the foundation for the study of other functions by constructing the general method of the research function through practice. In classroom teaching, let students build their own, feel the exponential function of the image and nature, to generate their own understanding of the exponential function.