函数是贯穿中学数学全部骨干知识的主线,是高中数学知识中最重要的内容,而二次函数是中学阶段学过的最正规、最完备的函数之一,高中数学涉及的函数与方程、分类讨论、数形结合和转化与化归四大数学思想,二次函数均有所涵盖。其抽象性的基本特征,导致大部分学生掌握起来相对 Function is the backbone of knowledge throughout the entire middle school mathematics, is the most important part of high school mathematics knowledge, and the quadratic function is one of the most formal and complete functions learned in the high school, high school mathematics involved functions and equations, classification Discussion, combination of numbers and transformation and transformation of the four major mathematical ideas, quadratic functions are covered. The basic characteristics of its abstract, leading most students to master relative