1 . 已知向量
,
,
满足
,
,
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7f14dfa9f463d57664c640102bb5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54139a0c2f4002fff4110fb04269cc7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e786468aa294c24d02e42f38a79d7a24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303645f6bb2511b74c0ddb51c1c9a731.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 下列关于向量
,
,
的说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
A.若![]() ![]() ![]() |
B.当![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
2022-04-12更新
|
463次组卷
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2卷引用:重庆市江津中学2021-2022学年高一下学期第一阶段考试数学试题
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3 . 某热爱飞镖的小朋友用纸片折出如图所示的十字飞镖ABCDEFGH,该十字飞镖由四个全等的三角形和一个正方形组成.在△ABC中,
,
,BC=4,边DE上有4个不同的点
,
,
,
,且
,记
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fbf24a7a97adfa533ad888e51ea149.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af32ecdc0dc2f1a60b47f3311a0587d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62eccb33ea66c03222468628f74d8c56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90f28ba1a822b4e722f1c431be0ed9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2141bb062175573a26612914aeb0b643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fbf24a7a97adfa533ad888e51ea149.png)
![](https://img.xkw.com/dksih/QBM/2022/4/8/2953891253706752/2955860223426560/STEM/fb17baa0-f418-43c8-ab3f-04d87ff0a243.png?resizew=193)
您最近一年使用:0次
2022-04-11更新
|
628次组卷
|
4卷引用:重庆市江津中学2021-2022学年高一下学期第一阶段考试数学试题