题型:解答题-问答题
难度:0.65
引用次数:1006
题号:8642423
已知向量
,
满足:
,
,
.
(Ⅰ)求
与
的夹角
;
(Ⅱ)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e708be069ecbfa5b18d36b40d0b8ccec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfc0de16bdd7237d6e171e35b4366f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/621a2597fa76798dff8a7832fdaec301.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6ba33bce399a92ce3c30ccb7f25ec9.png)
更新时间:2019-09-18 16:30:54
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
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适中
(0.65)
名校
解题方法
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3febdf13d98c88a542ad8c1707ae05.png)
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