1 . 如图,点
为△
的重心,且
,
,则
的值为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9a7b881dd04ffc14380053ae94f259.png)
![](https://img.xkw.com/dksih/QBM/2016/12/2/1573196334628864/1573196340715520/STEM/ce4270606fec465e82859a6c677f956b.png?resizew=149)
您最近一年使用:0次
2016-12-05更新
|
769次组卷
|
2卷引用:【全国校级联考】江西省上饶县中学2017-2018学年高一下学期期末考试数学(文)试题
2 . 如下图,平行四边形
中,
是边上一点,
为
与
的交点,且
,若
,
,则用
表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246c89eb04f8efd4a298eb536a78be02.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc35f63a26ad26f47e383c47a075fb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2b44181d0c5cce7648998fc49bbe71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f9367a7f31d574891bdb840f7be137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246c89eb04f8efd4a298eb536a78be02.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008137854976/1573008143654912/STEM/d8c3901919b745fe87270aeea5dfc6fe.png?resizew=204)
您最近一年使用:0次
3 . 等差数列
的前
项和
,且
,则过点
和
的直线的一个方向向向量是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3703d6a7912efd6a45ba42f45105e6bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ea39cd068fb9aa9aef76a813d4f9a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1141cda12f3801c453d3468d8d5bfe9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 在
中,
,则
的形状一定是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f6d7f4e6b80f2274a4110243a95ac0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.等边三角形 | B.等腰三角形 | C.直角三角形 | D.等腰直角三角形 |
您最近一年使用:0次
2016-12-04更新
|
512次组卷
|
2卷引用:2015-2016学年江西上高二中高一下期末文科数学试卷
5 . 已知
,
的夹角是120°,且
,
,则
在
上的投影等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696bf63a3a726968a19b8927be5a2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0928087301c0628fba2a9cd3af14f34d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd4dc7a567597a9c47c60c6d45d99bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb9f5e228ec8d484ad7b973ea98771c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696bf63a3a726968a19b8927be5a2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0928087301c0628fba2a9cd3af14f34d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
308次组卷
|
2卷引用:2015-2016学年江西省十三校高一下学期期中考试数学试卷
6 . 向量
、
的夹角为60°,且
则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696bf63a3a726968a19b8927be5a2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0928087301c0628fba2a9cd3af14f34d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f13b1c922c0ed8c2cd81c2c96ed3eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2870cb4f3ad0facab445a2bf4a8a99.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 如图,在平行四边形
中,
为
中点,若
,则
的值为
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572770885492736/1572770891374592/STEM/e7325ec36db34d7eaa4ee1c448c2eaaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc38c127b2b10719c7fb3c5c12bb486a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572770885492736/1572770891374592/STEM/0476bf19616646068d0cb4f5a7339761.png)
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572770885492736/1572770891374592/STEM/e7325ec36db34d7eaa4ee1c448c2eaaf.png)
A.![]() | B.![]() | C.![]() | D.1 |
您最近一年使用:0次
名校
8 . 已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246b5f8b79c523c28bcf2aa4cbcf25f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0d92f9ad7a75852138973dc0aa7d280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6244314f5a58693b8956c95bc9e328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246b5f8b79c523c28bcf2aa4cbcf25f5.png)
A.26 | B.22 | C.14 | D.2 |
您最近一年使用:0次
2016-12-04更新
|
185次组卷
|
3卷引用:2015-2016学年江西玉山一中高一下第三次考试理科数学卷
9 . 已知
,向量
与
的夹角为
,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453d3b69b059909c7ee3db298a6bacb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696bf63a3a726968a19b8927be5a2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0928087301c0628fba2a9cd3af14f34d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11d0840c5718c42ce3fe43fa00a4755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bf252cc6ff715d420c49272d33bc0c.png)
A.![]() | B.![]() | C.2 | D.4 |
您最近一年使用:0次
2016-12-04更新
|
228次组卷
|
2卷引用:2015-2016学年江西省上高二中高一5月月考理科数学试卷
名校
10 . 在平面直角坐标系中,
为原点,
,动点
满足
,则
的最大值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b41ffdf86e2dedf9a52a05dfee40810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598405cbed96c6328048fffa683a9bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fe5586f74518e063736d730a24ff93.png)
您最近一年使用:0次
2016-12-03更新
|
970次组卷
|
14卷引用:江西省奉新县第一中学2021届高三上学期第五次月考数学(文)试题
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