1 . 下列命题中,
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb259bd6064946492bde050ec5a9053f.png)
②若
,
满足
,且
与
同向,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e2533f07582599408157d872d257dd.png)
③若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c217d19068e0194986a989da93ffdde7.png)
④若
是等边三角形,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0e0035199419406ee67ebe79f62648.png)
其中正确的是_________ .(填写序号)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb259bd6064946492bde050ec5a9053f.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86ffae1773ae40b86cfc25d385f2eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e2533f07582599408157d872d257dd.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2720cbf09c689432bac86dd2d26fca1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c217d19068e0194986a989da93ffdde7.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0e0035199419406ee67ebe79f62648.png)
其中正确的是
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名校
2 . 已知向量
满足
(
为非零的实数),设向量
的夹角为
,有下列四个命题.其中正确的命题有___________ (填写所有正确结论的编号).
①存在
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c98c41072ee589f5067938c658884541.png)
②不存在
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7557713682c09ec526718378189f9f7e.png)
③当
变化时,
的最大值为1
④当
变化时,
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96022a881e03e32d3483d997c3f170c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7529ee92d5e92360480ca8f87c15fdb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de631112eb0f79150eb75576090848c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
①存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c98c41072ee589f5067938c658884541.png)
②不存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7557713682c09ec526718378189f9f7e.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a282d19bf2c827a98d4443330f7ca1.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a282d19bf2c827a98d4443330f7ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
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解题方法
3 . 如图,两射线
、
均与直线l垂直,垂足分别为D、E且
.点A在直线l上,点B、C在射线上.
的最小值;
(2)若
为等边三角形,求
面积的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ce674f8247d4ebc871938531dfb92e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
4 . 如图甲所示,古代中国的太极八卦图是以同圆内的圆心为界,画出相等的两个阴阳鱼,阳鱼的头部有眼,阴鱼的头部有个阳殿,表示万物都在相互转化,互相渗透,阴中有阳,阳中有阴,阴阳相合,相生相克,蕴含现代哲学中的矛盾对立统一规律. 其平面图形记为图乙中的正八边形
,其中
,则以下结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/840d9d0b-01e6-4510-92e2-e167fac7e700.png?resizew=236)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17d4a6cf11cda87b3dfafaecdec683f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/840d9d0b-01e6-4510-92e2-e167fac7e700.png?resizew=236)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() ![]() |
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20-21高一·全国·课后作业
5 . 一质点从点
出发,先向北偏东
方向运动了
到达点
,再从点
向正西方向运动了
到达点
,又从点
向西南方向运动了
到达点
,试画出向量
、
、
以及
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ed9c2e9fabbfc63733bae8fa079d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d632d4033dff97945c7a2305453b0d.png)
您最近一年使用:0次
2021-11-12更新
|
302次组卷
|
7卷引用:9.2.1 向量的加减法
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