摘要
二次函数是中学数学的重要内容之一,和它相关的内容,如:二次方程、二次不等式、二次三项式及二次函数的图像,构成了一个体系,称之为"二次式系列";本文主要在以下三个方面对这些题目的解法进行探讨:(一)求参数的范围;(二)根的存在情况的判别;(三)求最大、最小值;通过以上的讨论,以期提高中学生对此类题目的解题方法和解题技巧。
Quadratic Function is one of the important parts of middle school teaching, its relevant things, such as Quadratic Equation, Quadratic Inequality, Quadratic Trinomial and Graph of the Quadratic Function, constitute a whole system which is called quadratic serials. This paper is mainly to discuss the solutions to these mathematical problems in the following three aspects： 1. How to get the parameter range; 2. How to confirm the existence of the root;3. How to calculate the maximum and the minimum value. Generally, it is in order to improve the middle school student＇ s methods and skills of problem solving from the above discussions.
出处
《价值工程》
2010年第8期167-168,共2页
Value Engineering
关键词
二次式
二次方程
系数参数
方程的根
最大值
最小值
quadratic form
quadratic equation
parameter
root of equation
maximum value
minimum value
