名校
解题方法
1 . 已知
为锐角
的
边上一点,
,
,则
的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7020e3f80a48d72a7e9fcce8c7b249e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaac53a69bbf67c43f1ef48d811c4adf.png)
您最近一年使用:0次
名校
2 . 已知平面向量
的夹角为
,且
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d194ecefc9101001d88d3cc0bc9d6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b681e1b6c386187a93baf97f759614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a1c7a86e7df9c0b524a400cc1f58a2a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-03-31更新
|
1414次组卷
|
13卷引用:辽宁省庄河市高级中学2017届高三第四次模拟考试数学(理)试题
辽宁省庄河市高级中学2017届高三第四次模拟考试数学(理)试题辽宁省庄河市高级中学2017届高三第四次模拟考试数学(文)试题四川省成都市2017届高三第二次诊断性检测数学文试题河北省衡水中学2017届高三高考押题三卷文数试题河南省豫北豫南名校2018届高三上学期精英联赛数学(理)试题河南省豫北豫南名校2018届高三上学期精英联赛(文)数学试题河南省豫北豫南名校2018届高三上学期精英联赛理数试题河北省衡水中学2018年高考押题(三)文科数学【全国校级联考】河南省豫西名校2017-2018学年高二下学期第二次联考数学(文)试卷【全国校级联考】河南省豫西名校2017-2018学年高二下学期第二次联考数学(理)试题【校级联考】江西省上饶市横峰中学、铅山一中、余干一中2019届高三上学期第一次联考文科数学试题【校级联考】江西省上饶市横峰中学、铅山一中、余干一中2019届高三上学期第一次联考理科数学试题江西省萍乡市湘东中学2022届高三上学期开学考试数学试题
3 . 已知向量
与向量
平行,其中
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7a1df960feef63dec4790d63f52279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a417aa67355ab60f0aaf7b6822c76090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f5312eed6590462fcc24e58087a1d4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
您最近一年使用:0次
2017-02-16更新
|
463次组卷
|
2卷引用:2017届辽宁葫芦岛普通高中高三理上学期考试二数学试卷
4 . 已知向量
为平面向量,若
与
的夹角为
,
与
的夹角为
,则![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/74f435c6f6e541d38826425ea6551849.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/827fca3d374543d6844020ca8abfafad.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/181683c9ffaf4e8cbd0abdf3d428e2fa.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/b1738746545f49cc905bb047971d07ee.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/124413f37622406c9effc9541335d55d.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/181683c9ffaf4e8cbd0abdf3d428e2fa.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/28dc18d02dad434cbde2dcd5c2451b6b.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/6dca055adea64adc952f6194a2ed7b12.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/74f435c6f6e541d38826425ea6551849.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 关于平面向量,有下列四个命题:
①若
.
②
若
平行,则
.
③非零向量
满足
,则
的夹角为
.
④点
,与向量
同方向的单位向量为
.
其中真命题的序号为______ .(写出所有真命题的序号)
①若
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/11b21b59a41643a88321bf0cb9e48c34.png?resizew=130)
②
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/85fdff413e764b17961e4ee5957d6eb5.png?resizew=124)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/bdfd440212b047a9bad0ddb285cf662e.png?resizew=102)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/7b5c0caadb374575b34de1a92644b919.png?resizew=39)
③非零向量
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/5f82f37ee2a442da8ce539c7726d8262.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/bb827a57e6404bee82474387b081512a.png?resizew=104)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/bcac887640fd444f9e7438fe74d4a8e3.png?resizew=62)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/8e2bed42045342b3a07333b4bb9b0865.png?resizew=26)
④点
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/73389c69da9f46278d352bcfbd74236a.png?resizew=99)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/fffd5642b0234f3a8ca2df7874c562ce.png?resizew=26)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063270146048/STEM/73caf1b2805c487ea5ab74c380752e2b.png?resizew=53)
其中真命题的序号为
您最近一年使用:0次
6 . 如图,在
中,点
是边
的中点,点
在
上,且是
的重心,则用向量
表示
为
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063269867520/STEM/be0fa85d8c2e41e3b80fc9d1204ff3c8.png)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063269867520/STEM/6d0126e421004b0596f95edf924516c4.png)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063269867520/STEM/cfca60faba0c4dcf89f148cdcc8abd70.png)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063269867520/STEM/148cfce86c864b198b63293464e28e65.png)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063269867520/STEM/2cfe57f49b5f43b094a7ffb82987af65.png)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063269867520/STEM/9815b122283945048671a59a5f87e85e.png)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063269867520/STEM/6d0126e421004b0596f95edf924516c4.png)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063269867520/STEM/d9f8b93364c843d7923e1598f13307a2.png)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063269867520/STEM/e3abf9362b44498da36127baa8b91c64.png)
![](https://img.xkw.com/dksih/QBM/2016/10/11/1573063263903744/1573063269867520/STEM/be0fa85d8c2e41e3b80fc9d1204ff3c8.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
7 . 已知
与
不共线,若点
满足
,点
的轨迹是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858bf8324a9ea8db1a257714ff8afc01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3448a1728b998469d1fcaef320d68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8a749f1c1a1a2b49a1e4b21208f94a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.直线 | B.圆 | C.抛物线 | D.以上都不对 |
您最近一年使用:0次
13-14高一下·四川资阳·期末
名校
8 . 如图,
的
边长为
,
分别是
中点,记
,
,则
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844515840/STEM/c84dfcef31194835bb0c4c1a41af2c23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce1e07d1031dd1208dca2528f25fb57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1027d1dead0c4e4351a50f45a051caf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63404a6da223146b50ece9918c3a364.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaee68b99d6e767daae1fe065011fcfc.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844515840/STEM/c84dfcef31194835bb0c4c1a41af2c23.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
2016-12-04更新
|
306次组卷
|
3卷引用:2015-2016学年辽宁东北育才学校高一下段考二数学试卷
9 . 已知
是平面上不共线三点,
是
的重心,动点
满足
,则
一定为
的
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844466688/STEM/e8a982d902f142eb83859ef393cdc1af.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844466688/STEM/e5708f33446d4d14ac93e8b0b296dabf.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844466688/STEM/51ef1f783483475fb423ed579120fe0e.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844466688/STEM/490f7344a5b04028b8e65ffa55768433.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844466688/STEM/10758767e03b41029a8a32acc2ad43b8.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844466688/STEM/490f7344a5b04028b8e65ffa55768433.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844466688/STEM/51ef1f783483475fb423ed579120fe0e.png)
A.![]() | B.![]() |
C.![]() | D.重心 |
您最近一年使用:0次
10 . 设向量
、
、
满足
,且
,
则
的值为
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844401152/STEM/30b03f15bcdd4119993da6dcfeb0b50b.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844401152/STEM/7724e5f0119c4e4da52cc861380205ef.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844401152/STEM/bf0f98673edb48c38efa2a31cac33689.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844401152/STEM/9c000008ba794ffa83e514375d4efa33.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844401152/STEM/e660d5ffbc004bd3b6e95060bc3bb5b9.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844401152/STEM/b2b107521e5645c49f5db9f5f871e448.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844401152/STEM/dad47877a54c4b8abcb4da894cc57956.png)
A.7 | B.5 | C.![]() | D.![]() |
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