解题方法
1 . 如图,
的外心为O,三条高线
交于一点H,
与
的延长线交于点I,
与
的延长线交于点J,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/64665dd3-162b-4351-b446-2c929d0ea8c7.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c42f73b6b4cd5308071e6bedb83049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/64665dd3-162b-4351-b446-2c929d0ea8c7.png?resizew=174)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 已知边长为1的正
的中心为O,在
的内切圆上取一点P,将
四个向量分为两组
和
,把
的取值集合记为K,则对于一切点P,有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde0d926944bd2c09053dfc8d04d5146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd608c252992764c80d019ee570c8dc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2447b81cabe24e672b229b475ea1e0aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ad3829e7b29f4b50037fa8e07f4846.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
3 . 设平面向量
的长度是正整数,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ae13b3422b56ad185b7fd21b0a8459.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-04-06更新
|
206次组卷
|
2卷引用:2018年清华大学自主招生暨领军计划数学试题