名校
解题方法
1 . 若单位向量
的夹角为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596a3ee5d8473fc6619ea7730e13325b.png)
A.![]() | B.![]() | C.3 | D.7 |
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|
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2卷引用:内蒙古自治区锡林郭勒盟2023-2024学年高三下学期开学联考文科数学试题
2 . 已知向量
满足
,它们的夹角为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a838d9d01d18ed8cfb34d302cd74c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ecb2c40bb187663d2c67ee40d47090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd3aafbf6c34dc237215349763cf931.png)
A.2 | B.4 | C.6 | D.8 |
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|
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名校
解题方法
3 . 若平面向量
,
,
两两夹角相等且不共线,若
,
,
,则
的值为( )
![](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/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5943afb8ca75e69aa03dee57f9ae0c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082c6926889f84f438ea35f70bf05f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43540701ba206810d3e8d3f2e58561c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43924115fc9ecc63a460a21c154e84ab.png)
A.![]() | B.![]() | C.2 | D.6 |
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解题方法
4 . 已知动直线l与圆
相交于A,B两点,且满足
,点C为直线l上一点,若M是线段AB的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfeaa669e2f1c4f97f233879e335a890.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5a64bcb77f5f64e4af6930c249a270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfeaa669e2f1c4f97f233879e335a890.png)
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2020-05-05更新
|
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2卷引用:内蒙古阿拉善盟第一中学2020-2021学年高二上学期开学考试理科数学试题
名校
5 . 已知
是边长为2的等边三角形,
为边
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b8e8bc6f08c8c3b5dc2538e8d38af28.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b8e8bc6f08c8c3b5dc2538e8d38af28.png)
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2018-01-18更新
|
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2卷引用:内蒙古阿拉善盟第一中学2021-2022学年高二上学期开学考试理科数学试题