论文部分内容阅读
纵观近几年来全国各地的中考数学试题,不难发现有一个明显的特点,就是将几何图形放入坐标系的背景中,结合函数图象,设计相关问题,我们不妨称之为“坐标几何类”问题.此类问题综合性强,可以较为全面的考察学生运用知识解决问题的能力.解决此类问题时,点的坐标无疑起着重要作用.本文通过对典型问题的分析,帮助同学们掌握方法,提高解决此类问题的能力.一、基本思路方法1、代数法求点的坐标例1如图1所示,已知一次函数y=-x
Throughout the past few years throughout the country’s senior high school entrance examination math test, it is not difficult to find that there is a clear feature is the geometry into the background of the coordinate system, combined with function images, design related issues, we may wish to call Geometry class "problem.This kind of problem is comprehensive and can comprehensively examine students’ abilities of using knowledge to solve the problem.When solving such problems, the coordinates of the point will undoubtedly play an important role.This article through the analysis of typical problems, to help Students master the method to improve the ability to solve such problems First, the basic ideas Method 1, the algebraic method to find the point coordinates Example 1 As shown in Figure 1, known a function y = -x