名校
1 . 已知下列命题
①若
,
,则
;
②向量
与
不共线,则
与
都是非零向量;
③已知
,
,
是平面内任意三点,则
;
④若
为
所在平面内任一点,且满足
,则
为等腰三角形;
⑤若向量
与
同向,且
,则
>
.
则其中正确命题 的序号为__________ .
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076559f08d17fb25e82886e791719e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b23cc1e2140104001dd399ace17e9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01befa7f7561b4f33725fd714dbca42c.png)
②向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
③已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4859e37dc1d7a9ac9ba486638756dea.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28637cd70768b43eb160fe885a830bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
⑤若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e6d2bc60227843ec0e880ea13ea767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
则其中
您最近一年使用:0次
名校
2 . 已知
,现有如下四个结论:①
;②四边形
为平行四边形;③
与
夹角的余弦值为
,④
;则上述正确结论的序号为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/247c94145088c4394ee2dc8ae1672b3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4145c0fc69cd40771b078e6b732336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436b63e793d6d39990341d29cf47f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d86ed5700cde027ca83174d9c10292.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c516c60100e3db9550f6767948bf8da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0f781e0ca377ddc99ac101ddc4907b.png)
A.①③ | B.②④ | C.①④ | D.②③ |
您最近一年使用:0次
2019-10-22更新
|
306次组卷
|
3卷引用:陕西省(全国II卷)百校联盟2019-2020学年高三上学期TOP20九月联考数学(理)试题
3 . 已知四点
,
,
,
,给出下面四个结论:①
;②
;③
;④
.其中正确结论的序号为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c737ce37d2a8fc149ce0aaa0d97639e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df9670f96ee13a7263c171590b355752.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3aa8c4d6fb30f9212f3b42892a050a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e8bf804f3b72509c951738e8b80fb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366494320ec1a1d08c525ddc9c4ad49e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
A.①③ | B.①④ | C.②③ | D.②④ |
您最近一年使用:0次
名校
4 . 以下各说法中:
①任意一个非零实数与向量
的积都是一个非零向量;
②零与任意一个向量
的积都是零;
③对于任意一个非零向量
,向量
可以表示所有与
共线的向量;
④若
,则一定存在实数
,使得
.
正确说法的序号是( )
①任意一个非零实数与向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
②零与任意一个向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
③对于任意一个非零向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e413e074f78e3ec8ec8720fb06d256d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069da5c624837df29947b7b8bf722097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6812f9cd174c662e3f98cd9eee376083.png)
正确说法的序号是( )
A.①②③ | B.②③④ | C.①②③④ | D.③ |
您最近一年使用:0次