论文部分内容阅读
现行高中数学教材从正余弦函数的图象入手,直观地引入周期函数的概念,这一处理方是正确的.但是如果教学中讲授不得法,“直观”不得要领,加之思维定势的负作用,易造成概念不清,可能产生似是而非的错误.比如,周期函数的定义域是否关于y轴对称的问题,但是一例.
The current high school mathematics textbook starts with the image of the sine and cosine function and intuitively introduces the concept of the periodic function. This treatment is correct. However, if teaching is not allowed in the teaching, “intuition” is indispensable, and the negative effect of mindset is added. , It is easy to cause the concept to be unclear, and it may produce plausible errors. For example, whether the domain of the periodic function is related to the y-axis symmetry, but an example.