题文
已知向量
=(2,1),



=10,|

+

|=5

,则|

|=( ). 题型:未知 难度:其他题型
答案
5解析
该题暂无解析
考点
据考高分专家说,试题“已知向量=(2,1),=10,|+.....”主要考查你对 [向量模的计算 ]考点的理解。
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