1 . 已知非零向量
,
,若
与
互相垂直,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/b83c5803cc8c05849028a57c4bd4ee72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a06c8eae3652486cf9e416ce3a8ffc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e48348ee133ffcf7b6fcb5db58d6266.png)
A.![]() | B.4 | C.![]() | D.2 |
您最近一年使用:0次
真题
2 . 已知
为非零的平面向量.甲:
乙:
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae951e0bb5a2a406f1572fc1e4964265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02452d45030dd8e08de9cf6b1da61dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a90f1e7b09ade6210e2ded8598827a.png)
A.甲是乙的充分条件但不是必要条件 |
B.甲是乙的必要条件但不是充分条件 |
C.甲是乙的充要条件 |
D.甲既不是乙的充分条件也不是乙的必要条件 |
您最近一年使用:0次
2022-11-09更新
|
752次组卷
|
3卷引用:2004 年普通高等学校招生考试数学(文)试题(湖北卷)
真题
3 . 如图,在
中,已知
,若长为
的线段
以点
为中点,问
与
的夹角
取何值时,
的值最大?并求出这个最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878e89b6eca35e34c863e832a2c661db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e00e4e17dc8a2ef88e23e348439edf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1b5ba2f12fee43c13d97f0424241f7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/24/0ecc3e41-fc3e-4ed9-ba8d-758fc156cea0.png?resizew=100)
您最近一年使用:0次
2017-10-07更新
|
523次组卷
|
3卷引用:2004 年普通高等学校招生考试数学(文)试题(湖北卷)
真题
4 . 已知
的面积为
,且满足
,设
和
的夹角为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
(I)求
的取值范围;(II)求函数
的最大值与最小值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2333da32638ec636fa1e69e750ca4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://img.xkw.com/dksih/QBM/2012/3/6/1570789981249536/1570789986754560/STEM/d02798249192424297174adfdb39f059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d18eecc9135b568c133d8bebe6d18839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01adf0d0159e98cb1046f5aef71798fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
(I)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd23437bdcd6f88564e2bc04b95a07c4.png)
您最近一年使用:0次
2016-12-01更新
|
1100次组卷
|
3卷引用:2007年普通高等学校招生考试数学(理)试题(湖北卷)