论文部分内容阅读
我国著名数学家华罗庚曾说过:“数缺形时少直观,形少数时难入微;数形结合百般好,隔离分家万事休”。二次函数是继一次函数、反比例函数之后的又一种重要的函数,是描述现实世界变量之间关系的重要数学模型。要解决二次函数的问题,需要紧紧抓住图形,利用数形结合的方法求解。一、利用函数图像解决问题二次函数的图像的特点主要有:
Hua Luogeng, a famous mathematician in our country, once said: “When the number of lack of shape less intuitive, shaped when a few are hard to find; Shape with everything good, isolated from the house everything off.” The quadratic function is another important function after the first order function and the inverse proportion function, and is an important mathematical model describing the relationship between the real-world variables. To solve the problem of quadratic functions, we need to grasp the graph tightly and use the method of numerical combination to solve it. First, the use of function images to solve the problem Quadratic function of the image features are: