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动点问题是近年学业考试的压轴热点.当试题中出现一个或多个动点时,很多学生都有“摸不着头脑”的恐惧感和“还有解吗”的忐忑感.“动态定位分析”可以有效解决这类问题.所谓动态定位分析,就是着眼全局,先从整体分析动点所有运动区域,再找到满足题目要求的点的大概位置,进而确立等量关系式,实现分类解决问题的方法.一、问题引入图1例1如图1,在矩形ABCO中,O为坐标原点,B点坐标为(8,6),A、C在坐标轴
The problem of moving point is the hotspot of the academic test in recent years.When there are one or more moving points in the test, many students have the sense of fear of “scratching their head ” and “the solution of ”. “Dynamic Positioning Analysis ” is to focus on the overall situation, first from the overall analysis of all motion points moving point, and then find the approximate location of the topic to meet the requirements, and then establish the equivalent relationship First, the problem introduced Figure 1 Example 1 In Figure 1, rectangular ABCO, O is the origin of coordinates, B point coordinates (8,6), A, C in the coordinate axis