已知平面向量
,
,若
,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df656ffb7c2bdb3a300c54a757176f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba62c044123913f4a6692aa5950b8c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4475f32d4251fe474551fe2766ce929a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() ![]() | B.![]() | C.![]() ![]() | D.![]() |
2024·全国·模拟预测 查看更多[2]
更新时间:2024-01-08 14:57:50
|
相似题推荐
单选题
|
较易
(0.85)
解题方法
【推荐1】已知向量
与
的方向相反,
,则
( )
![](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/17385d39ef9277310d1a771c4ef14faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f6486933fe3c2459cb13943244a088.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】
的三内角
所对边的长分别是
,设向量
,若
//
,则角
的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450cd1b4d1114db15da6a7857de6f20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bfbd2ef51eaeb6e686e27cc95638e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920a0d7029955d5df014d517248c8174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.30° | B.60° | C.120° | D.150° |
您最近一年使用:0次
单选题
|
较易
(0.85)
解题方法
【推荐1】已知
中,
,点D为边
的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf714dfcd21f5b73a26daa9b669a06ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4608a395c59d364f2061789be1a388f6.png)
A.![]() | B.6 | C.![]() | D.![]() |
您最近一年使用:0次
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较易
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名校
解题方法
【推荐2】
中,
,
,
,点C是线段
上的动点,点D是
的中点,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91934cac6477909cf68ec266f562a397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a99044cdedf9e67bffd16a7eeeadf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76695db6173852b2a5a66003cd4efb2.png)
A.![]() | B.![]() | C.![]() | D.2 |
您最近一年使用:0次