(通用版)2020版高考数学大一轮复习第25讲平面向量基本定理及坐标表示课件文新人教A版.pptx

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课前双基巩固课堂考点探究教师备用例题,1.了解平面向量的基本定理及其意义. 2.掌握平面向量的正交分解及其坐标表示. 3.会用坐标表示平面向量的加法、减法与数乘运算. 4.理解用坐标表示的平面向量共线的条件.,考试说明,知识聚焦,不共线,(x1+x2,y1+y2),(x1-x2,y1-y2),有且只有,a=1e1+2e2,基底,(x1,y1),(x2-x1,y2-y1),x1y2-x2y1=0,对点演练,题组一 常识题,题组二 常错题,索引:利用平面向量基本定理的前提是基底不能共线; 由点的坐标求向量坐标忽视起点与终点致误;两个向量共线的坐标表示公式掌握不牢.,探究点一 平面向量的基本定理,探究点二 平面向量的坐标运算,探究点三 平面向量共线的坐标表示,【备选理由】 例1是关于平面向量基本定理的问题,例2是利用平面向量的坐标运算解决范围的问题,例3是平面向量共线的坐标表示的问题,希望通过练习能提高学生的解题能力.,

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