题文
已知向量
满足

,则

___________. 题型:未知 难度:其他题型
答案

.
解析
∵

,∴

,
∴

,∴

.
考点
据考高分专家说,试题“已知向量满足,则___________......”主要考查你对 [向量数量积的含义及几何意义 ]考点的理解。
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