如果平面向量
,
,那么下列结论中错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6058a2d06b42c223208e37b901b7ff9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a38afd43a2b5b67366f3376abd3e35.png)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
更新时间:2023-01-03 20:28:35
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相似题推荐
单选题
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较易
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名校
【推荐1】已知向量
,
,则“
”是“
与
的夹角为钝角”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eefcf2a70eef3cb3a27d70789b3a39c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358010361b31edbd51c6e96dde464e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9912db7ab9e6a35c3993fabce4f87178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560ee2894ba8c5cee6633430cc8b3b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
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解题方法
【推荐2】若
,
,且
,则
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fc7a342293983cc4865498c121493d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a593f5a5b0b6d5a3e4bb0481875af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fab3f98be01a622d8305cb05766929f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
【推荐1】设
,向量
,
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79d05c78e4e03ff3a64b24f272b876b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f1b1d236c77645c4a610c7c45a0b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e912b86e064e678ab34210f3fa02ef.png)
A.![]() | B.![]() | C.2 | D.10 |
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【推荐2】向量
在向量
上的射影为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec4b5b808b3ef48b35feb3a95b37224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b12729dbc8aac5c77094d76576a351b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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较易
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解题方法
【推荐1】已知向量
,向量
,且
,则
的值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c737cfaf9538428aa51f1c3deb42d014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0446e3fc72259d461735f2a5dc2a1061.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
【推荐2】若
=(2,-3),则与向量
垂直的单位向量的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
A.(3,2) | B.![]() |
C.![]() ![]() | D.以上都不对 |
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解题方法
【推荐1】向量
在向量
上的投影向量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bab024b8a99d3efc78fd10f3599cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/127dfac893abd9e5455a561ef6134a94.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
【推荐2】若向量
,
满足
,
与
垂直,则
在
上的投影向量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324ae9aabe9b5d2800807da07b3d0268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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