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yi dao xi ti de duo zhong jie fa ji qi tui guang
Pages: 10
Year: Issue:  9
Journal: Guangdong Education

Abstract: 例题.已知平面上三点A、B、C满足|(AB)| =6, |(BC)|=8,|(CA)|=10,则(AB)·(BC)·(BC)·(CA)+(CA)·(AB)的值等于多少? 分析:本题考查平面向量数量积的计算方法,突出运算技能的考查,为了便于比较,下面给出5种解法. 解法1:(用向量数量积的定义解)
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