在《向量法是解决垂直问题的一把利器》(《数学通讯》2010年第4期(下半月))中,我们介绍了如何用向量回路法解垂直问题.有读者和我们联系,他认为使用我们介绍的方法确实比较有效,可问题是:虽然向量回路法并没有超纲,但平时大家更多地是习惯于使用向量坐标法.能否谈谈向量坐标法如何解题?我们认为:回路解题是向量法的一个特色,研究向量法就必须得研究回路.如果介绍向量解题,总是强调向量法与坐标法之间的转化,试想一下,倘若向量没有自己的独门武器,总要转化成坐标法,那么直 In “The Vector Method is a Sharp Weapon for Vertical Problems” (Mathematical Newsletter, Issue 4, 2010 (second half)), we show how to solve vertical problems with vector loops. Some readers have contacted us and think Using the method we introduced is indeed more effective, but the problem is: Although the vector loop method is not super-class, but usually we are more accustomed to using the vector coordinate method. Can we talk about vector coordinate method how to solve? We think: Circuit problem solving is a feature of vector method, the research vector method must have a research circuit.If the introduction of vector problem solving, always emphasizing the transformation between vector and coordinate method, imagine, if the vector does not have its own unique weapon, the total To be converted into coordinate method, then straight