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§1.2 、矢量的加法

定理 1.2.1 如果把两个矢量 为邻边组成一个平行四边形 OACB ，那么对角线矢量. §1.2 、矢量的加法. B. O. A. 这种求两个矢量和的方法叫 三角形法则. B. C. O. A. 这种求两个矢量和的方法叫做 平行四边形法则. 定理 1.2.2 矢量的加法满足下面的运算规律：. （ 1 ）交换律：. （ 2 ）结合律：. （ 3 ）. A 4. A 1. A 3. A 2. A n-1. O. A n. 这种求和的方法叫做 多边形法则. 矢量减法. C. A. B.

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§1.2 、矢量的加法

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  1. 定理1.2.1如果把两个矢量 为邻边组成一个平行四边形OACB，那么对角线矢量 §1.2、矢量的加法 B O A 这种求两个矢量和的方法叫三角形法则.

  2. B C O A 这种求两个矢量和的方法叫做平行四边形法则 定理1.2.2矢量的加法满足下面的运算规律： （1）交换律： （2）结合律： （3）

  3. A4 A1 A3 A2 An-1 O An 这种求和的方法叫做多边形法则

  4. 矢量减法

  5. C A B

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