高中“函数与方程”这一章节的内容是借助学生初中所学的二次函数来探讨一元二次函数与一元二次方程的关系.备课时,我设想先让学生回忆已学的一元二次函数基础知识,然后利用多媒体演示一元二次函数的图像,让学生通过图像来研究一元二次函数、一元二次方程与一元二次不等式的关 The content of the chapter “Functions and Equations” in senior high school is to use the quadratic function learned by students in junior high schools to discuss the relationship between the one-dimensional quadratic function and the one-dimensional quadratic equation. When preparing lessons, I envisage that students should first recall the learned one. The basic knowledge of the subfunction, and then use the multimedia to demonstrate the image of the quadratic function, let the students study the relationship between the unary quadratic function, the one-variable quadratic equation and the unary quadratic inequalities through the image.