破解平面向量题的三种方法

• 作 者: 华接春
• 出 处: 高中生
• 发表日期: 2015年36期
• 关键词: 平面向量 坐标法 数形结合 直角坐标系 单位向量 代数问题 变量转化 垂直关系 加法运算 加减运算

一、坐标法平面向量具有代数和几何的双重身份,是数与形的集中和统一.在解题时,我们既可以从“形”(作图研究)方面入手,也可以从“数”(建系计算)方面考虑,但“形”往往具有一定的难度,而“数”只需运算,简单得多,对思维的要求也不高.所以,用先建再进行坐标运算的方法解答平面向量题,是一种非

First, the coordinate method Plane vector with algebraic and geometric dual identity, is the number and shape of the focus and unity.In the problem-solving, we can not only from the “shape” (mapping study) aspects, but also from the “ The number of ”“ (building system computing) considerations, but ”shape “ often has a certain degree of difficulty, and ”number " only need to operate, much simpler, less demanding on the thinking.Therefore, Then coordinate calculation method to solve the plane vector problem, is a kind of non