定义平面向量的一种运算
,
,其中
,
是
与
的夹角,给出下列命题:①若
,
,则
;②若
,则
;③若
,则
;④若
,
,则
.其中真命题的序号是________ .
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2020高三·全国·专题练习 查看更多[5]
(已下线)专题12+平面向量-2021高考数学(理)高频考点、热点题型归类强化福建省德化第二中学2022-2023学年高一下学期期中考试数学试题北京市陈经纶中学2023-2024学年高三下学期2月阶段性诊断练习数学试题(已下线)压轴题平面向量与解三角形新定义题(九省联考第19题模式)练北京市海淀区人大附中2024届高三下学期统练2(3月月考)数学试题
更新时间:2020-10-02 11:28:32
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