1 . 已知向量
,
,若
,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67af95baeeb270bdc256196db8e5fedf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81bb589c61e63a63eb4ade152aa1b47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41bac5345498ac61605b9587e82498ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.3 | C.-1 | D.-1或2 |
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名校
解题方法
2 . 如图,正方形ABCD的边长为
,O是BC的中点,E是正方形内一动点,且
,将线段DE绕点D逆时针旋转
至线段DF,若
,则
的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93af9774200946261f0ccba3e6eeba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4d57283620632fc0c79873969a1854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/c244c3aa-8388-41c3-a5c5-1d8e2dd61d51.png?resizew=164)
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2020-05-28更新
|
1180次组卷
|
4卷引用:辽宁省本溪市高级中学2023-2024学年高三上学期高考适应性测试(一)数学试题
辽宁省本溪市高级中学2023-2024学年高三上学期高考适应性测试(一)数学试题2020年浙江省新高考考前原创冲刺卷(三)湖北省武汉市四校联合体2021-2022学年高一下学期期末联考数学试题(已下线)第一次月考填空题压轴题十四大题型专练-举一反三系列
3 . 已知
,
,
,
,且
,则点
的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bad658e33513bf106d1d6bda984d07f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b47e7bf02b3ca16f7d96b9369e51a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0ef3c10c2867b64ef705a71b1f7c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fe58817538d3432f490b5f7c7d95c30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07867e9ba815fe5cc5884b36dc24e49b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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