用列表法探索指数函数模型教学一例

A Case of Using Tabulation Method into Model Teaching of Exponential Function

函数应用是职业学校数学教学的重点,用函数方法解决实际问题的关键是建立数学模型。用列表法引导学生建立指数函数增长模型和对数模型是课堂教学的有效手段,是职业学校新课程提倡的方法,它旨在让学生用直观明了的列表法得出数学模型,并借助现代计算工具学会解决如GDP增长、人口增长、生物体内碳-14衰减等实际问题,加深认识指数函数模型应用的重要性。

The application of function is the key point for mathematical teaching in vocational school, and the key to solve practical problems with function is to establish the mathematical model. Using the tabulationmethod to guide students to establish exponential model and logarithmic model is an effective means of classroom teaching, and also is a new teaching way to be advocated in vocational school. It aims at letting the students to use this simple and direct way to obtain mathematical model, and the use of modem computational tools to solve the actual problems, such as GDP growth, population growth, biological carbon -14 attenuation ,therefore to deepen the understanding of the importance of the application of exponential function model.