若
,
与
、
的夹角都是60°,且
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6728ba9de1e0059bd3f2c38f1c168c00.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7796cec50ed668e457ae5398295533af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.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/c7958a6bddd1d578bbd6fbcb92e3f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fa8ea29001bb1f0c1e5157aff2fca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a1fa7538549bf04c02a09ead1745ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6728ba9de1e0059bd3f2c38f1c168c00.png)
23-24高二上·上海黄浦·期中 查看更多[2]
更新时间:2023-11-14 07:45:08
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填空题-单空题
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适中
(0.65)
名校
解题方法
【推荐1】已知
,
表示两个夹角为
的单位向量,
为平面上的一个固定点,
为这个平面上任意一点,当
时,定义
为点
的斜坐标.设点
的斜坐标为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8808c185b41f67be1cac5f3889718fa.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5253a9a71037d60059b60237824193b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad20e2bc6576fc461419f8f138d26e7.png)
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您最近一年使用:0次
填空题-单空题
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适中
(0.65)
名校
解题方法
【推荐2】已知
,
为单位向量,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac00d4d9ea076be910541978103bd7f.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8b861031524d6dfd49483a2225bb3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/214c98d1a50eeb245c8670d276a84cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac00d4d9ea076be910541978103bd7f.png)
您最近一年使用:0次
填空题-单空题
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适中
(0.65)
名校
【推荐2】已知点
是
的重心,若
,
,则
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18574912ba0488ea87920534ff14201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361123c76c18b70c89f9ecff84143900.png)
您最近一年使用:0次