一、本章教材分析(一)教材的地位与作用本章是学生学习了正比例函数、一次函数和反比例函数后函数学习的一个重要环节。二次函数是描述变量之间关系的重要的数学模型。著名的自由落体运动公式h=1/2gt2就是二次函数刻画物体运动的最好例证,是最重要的物理学公式之一,二次函数既是其他学科研究时所采用的重要方法之一,也是某些单变量最优化问题的数 First, the textbook analysis of this chapter (a) the status and role of textbooks This chapter is an important part of the function learning for students to learn the positive proportional function, the first function and the inverse proportion function. Quadratic functions are important mathematical models that describe the relationship between variables. The famous free-fall motion formula h = 1 / 2gt2 is the best example of quadratic function to describe the movement of objects. It is one of the most important physical formulas. The quadratic function is not only one of the important methods used in other disciplines, but also The number of certain univariate optimization problems