在平行四边形
中,
是
的中点,
交
于点
.
(1)若
,求实数
与
的值;
(2)若
,
,且
,则当点
在
边上运动时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79cb8c1590d59393eb707cf7dfcbb0c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c253d5e4d6d6f7db0f32b812e12d88a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8f6be38207f1b3af86e2f59bf08a195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acaf634dd80d1b74ea638e34d692dbd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df4af2fee086a0ec9e704c615a843fe.png)
22-23高一下·上海虹口·期中 查看更多[3]
上海市外国语大学附属外国语学校2022-2023学年高一下学期期中数学试题(已下线)模块二 专题2 《平面向量》单元检测篇 B提升卷 (北师大版)(已下线)模块二 《平面向量》单元检测篇 B提升卷(人教A)
更新时间:2023-05-19 22:05:37
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解答题-问答题
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【推荐1】已知
,
,且
与
的夹角为
.
(1)求
的值;
(2)若
,求实数
的值;
(3)求向量
与向量
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0706f7a791d89abcd6fc8a24df927daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f75b4d09611b00e18146b9b1f4a9ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39d1d88189726ae99c309644fca3494.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc3403703cf93d061f4e1bce9c09c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
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【推荐2】(1)已知
,且
,
,求
.
(2)已知向量
,
,求
与
的夹角
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b958a367fa2f08b6202a5a6ebf5e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02af59613596682734297aebc578801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e405db6c09d6ab5739cabbb63cd3b3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
(2)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69804de4a5c14675e2e4dfb5927d2165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0f1318945f75a2162e0593b4c436c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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解题方法
【推荐3】已知向量
、
的夹角为
,且
,
.
(1)求
与
的值;
(2)求
与
的夹角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e310702748855c3edccd151aae0143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fa8ea29001bb1f0c1e5157aff2fca5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc23a04cdac6439ea170e799f1c1df5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb6118172f384a565afcdfd84e9cdb0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602020d2235d81f2ae3a421f0e432669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4e49d17d4ad440d37c6f4bc8daba25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5301e013bcb05bbcce0ba5c8dfeb40.png)
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【推荐1】已知A(0,2,3),B(-2,1,6),C(1,-1,5)
(1)求
、
、
;
(2)求以
、
为边的平行四边形的面积;
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547fe456ec0fb6da86350d14e95dae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9ee8474d63b06a57c3cd612c7e87d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d63e57f893ff7942d98e50e8a26d65.png)
(2)求以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547fe456ec0fb6da86350d14e95dae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9ee8474d63b06a57c3cd612c7e87d1.png)
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【推荐2】如图,平面向量
与
是单位向量,夹角为
,那么,向量
、
构成平面的一个基.若
,则将有序实数对
称为向量
的在这个基下的斜坐标,表示为
.
,
,求向量
在这个基下的斜坐标;
(2)设
,
,求
;
(3)试探究两个向量在这个基下的垂直条件,要求写出探究过程.
![](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/2d5bca00fa20e6e80480b9d06d2e52ee.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/e8df6d6a87e4c3f2ecf22dd0679ad756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7c25c9e3fecf60497fd2cffd0d6d8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f79938bf132ec7feb7f6e82a3c2440b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeadcb8f9a35f195369de2572573f726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/340288ed4644a36a67baa0c36351ae8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c317ccc4aee3c247efe67b6693f8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e8eea1a41c91f0e88591f256f2a160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
(3)试探究两个向量在这个基下的垂直条件,要求写出探究过程.
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【推荐1】如图,在
中,点
满足
,
是线段
的中点,过点
的直线与边
,
分别交于点
,
.
,求
的值;
(2)若
(
),
(
),求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee4139d603481deefdc0aab2b753c44c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd4af2c49cfde809f4bdae31f946a4a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cb96903ddcfe069075ef87760ff6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be362dec96173f246ff747264007817.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c98c0ec4c99989333faa478a946985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587b693b82241eb9c32cdbb96c209f33.png)
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【推荐2】如图,已知点G是
的重心,点P是
内一点(包括边界),设
,
.
![](https://img.xkw.com/dksih/QBM/2022/7/7/3017651300950016/3025018046504960/STEM/de1cb916dad54c98855229002b66c084.png?resizew=190)
(1)试用
,
表示
,并求
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffffbccf0eb96123a237860c12a1b892.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae92f0c583cc9daf980a8621ad96aef5.png)
![](https://img.xkw.com/dksih/QBM/2022/7/7/3017651300950016/3025018046504960/STEM/de1cb916dad54c98855229002b66c084.png?resizew=190)
(1)试用
![](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/670f6533aaf27dd575f4f26e0c5928d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0d5fd8f951e3aab842dfd18f2f7f18.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d88fce4e09a7e9acfd154f0b8d42b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
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