1 . 如图,在平行四边形
中,
,
,
,
,
,
是平行四边形
所在平面内一点,且
.若
,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/2021/11/18/2856039445012480/2895562126598144/STEM/15c034b6-cde3-4363-b4e1-3c38d095e88a.png?resizew=199)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255a3e8a03775d0fc699ee1f7bb61a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e8c1551d814f36aa6773ff5986c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0bc87edf409479ea7d73278ed4f987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2047ceb577ccb3a944173f310777ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9b4ca7bd0e6c086d75b81f1761d387.png)
![](https://img.xkw.com/dksih/QBM/2021/11/18/2856039445012480/2895562126598144/STEM/15c034b6-cde3-4363-b4e1-3c38d095e88a.png?resizew=199)
A.![]() | B.![]() | C.0 | D.2 |
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2 . 如图,在
中,D是
边的中点,E,F是线段
的两个三等分点,若
,
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/cc3143c8-0abb-426d-9112-a7d474068332.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1573a28374614b545b97f10d2cdcdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3b6d70dd5d5388166e03f0cc4d0721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9eb0d18dd1786683e7c2879965bfb4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/cc3143c8-0abb-426d-9112-a7d474068332.png?resizew=150)
A.![]() | B.![]() | C.1 | D.2 |
您最近一年使用:0次
2021-05-12更新
|
749次组卷
|
6卷引用:贵州省毕节市2021届高三三模数学(文)试题
贵州省毕节市2021届高三三模数学(文)试题贵州省毕节市2021届高三三模数学(理)试题(已下线)考点02 平面向量的数量积-2022年高考数学(文)一轮复习小题多维练(全国通用)(已下线)微专题05 妙用极化恒等式解决平面向量数量积问题-【微专题】2022-2023学年高一数学常考点微专题提分精练(人教A版2019必修第二册)(已下线)重难点专题03 妙用极化恒等式解决平面向量数量积问题-【帮课堂】(苏教版2019必修第二册)(已下线)第八章 平面向量(6大易错与4大拓展)-单元速记·巧练(沪教版2020必修第二册)
解题方法
3 . 在矩形ABCD中,
BC=2,点F在CD边上,若
则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff007759f7a5e09bc6a78760528bc9cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5707f6a166d8069a15504940566b766f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038185491fc19334524967c674e33523.png)
A.0 | B.2 | C.![]() | D.4 |
您最近一年使用:0次
2021-02-07更新
|
272次组卷
|
4卷引用:贵州省毕节市2021届高三上学期诊断性考试数学(文)试题(一)
4 . 已知向量
,
,
,
,若
,则实数t的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bedb56850be6b61ffd7da402afa923eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca048e948dae0c9882da9e6a7ce6663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235ff50f2382ca781d50d8ad509f324c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf039c46a25e331446c6ee1e9af3c82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7889d8ac3c5b69e22dd8c03e9290c566.png)
A.![]() | B.![]() | C.4 | D.![]() |
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