已知
,
与
垂直,
,且
与
的夹角是钝角,则
在
方向上的投影为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5703cc339983ceadf441ba9df493d910.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/87a4fe23b799a0777b2faebd77dd05bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2941c96f6bfbc0ca5e4940ba02b05d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
更新时间:2023-05-30 16:54:17
|
相似题推荐
填空题-单空题
|
适中
(0.65)
名校
【推荐1】正方体
的棱长为1,
是正方体(包括表面)中的动点,且满足
,则点
所形成的几何体的体积等于________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5324968644c469e4d2fd418c33fb06bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐2】已知非零向量
,
满足
,
,向量
在向量
方向上的投影为2,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d69c233f69dd7cfadaa0086a0aa218.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f18996bd00253c3ad9f91780103affb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da45c319a8a244ef2410916d2d50c5ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d69c233f69dd7cfadaa0086a0aa218.png)
您最近一年使用:0次
填空题-双空题
|
适中
(0.65)
解题方法
【推荐1】已知平面向量
,满足:
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc6092100600070328042adaf76aad3.png)
________ ,
的取值范围是_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96022a881e03e32d3483d997c3f170c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243d8dd0745f475770e3a8de0a496696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89811165d009e98e45fb96ca6a4404b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371ba95d0ac2642d0e112ea2430025f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1092be4e49590890b7e4a174020947c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc6092100600070328042adaf76aad3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0200ccc79110765898063639bff30f5d.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐2】已知向量
,
,则
的最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e968508a03c0c471aa56ff426182b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b740b76c8cb1845711f0d6f4275fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9441d59d8cbe117c92f73a29c463d345.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐1】已知夹角为
的两个单位向量
,向量
满足
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c66da9dfbb22b3aa8bddea33b5ae30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7b78b446c05c9aea5bf87c7b17258a.png)
您最近一年使用:0次