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1 . 如图, 在四边形
中,
,
,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/33d7d31a-ccb7-4096-ae3c-7ae3e4e815a3.png?resizew=190)
(1)求
的值;
(2)若
求实数λ的值;
(3)在(2)的条件下,若M,N是线段BC上的动点, 且
求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e282bb1d9fbf8634b3506ee5358ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/33d7d31a-ccb7-4096-ae3c-7ae3e4e815a3.png?resizew=190)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ed86beeec5a7e4201187c8d7681fc6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db098ed3836a5f557ba247fc195dfb3.png)
(3)在(2)的条件下,若M,N是线段BC上的动点, 且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edbf1b539b41fc2cc32cf190f6d6e329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ab157cd50abfa3a6de8027f3f0b424.png)
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2 . 已知
则 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30195fdef66f863248e03a26b3338134.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abfd42e48ce99d98bf54d458da4dd775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30195fdef66f863248e03a26b3338134.png)
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解题方法
3 . 已知
,
,且
, 则向量
与
夹角的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3f8682540cd84c62e6fa835cd02f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16d81d266f24698696a81ed5e007680.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f5d2e176efcf02e085b011c35eeb4e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
4 . 如图,在
中,
是
的中点,点N在边
上,且
,
与
相交于点
,设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ce0da153621bbd05519f168b527e3e.png)
_________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb4713985fd15713e52c5001059345c.png)
_________ .(注:用
和
来表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ac7b134d8d1136f90233addaa4723f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ba495e8f9fe02229a4248fdbfb4710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ce0da153621bbd05519f168b527e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb4713985fd15713e52c5001059345c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/8cf6e567-0ffc-4f88-8f23-ded09856cf2e.png?resizew=141)
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5 . 已知向量
则 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acef6e45e16d4273569b2d997f08f4f7.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0840fc52565f891230da8b2e4ab1182a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acef6e45e16d4273569b2d997f08f4f7.png)
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6 . 在△ABC中, 角 A, B, C所对的边分别为a, b, c,
则角C为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d04e6097d846fd9d97bbcb70a15302d7.png)
A.15° | B.45° | C.15°或105° | D.45°或135° |
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解题方法
7 . 已知
, 且
,则
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1587372f48f35c34ef3962d8dd796d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39346db456e8935d6d95a14b1d50ccde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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2024-03-27更新
|
816次组卷
|
4卷引用:天津市第五中学2023-2024学年高一下学期3月月考数学试题
名校
8 . 在
中, 已知
, 则 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acd3ee01d9f843a8579ffb0b7d9d82.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4c3601e8b0ddcf6542369ea0c3032a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acd3ee01d9f843a8579ffb0b7d9d82.png)
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9 . 若
,向量
与向量
的夹角为
,则
在
上的投影向量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94688104fff1a08bf11b98d5ca178525.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-27更新
|
973次组卷
|
5卷引用:天津市第五中学2023-2024学年高一下学期3月月考数学试题
天津市第五中学2023-2024学年高一下学期3月月考数学试题(已下线)模块五 专题1 全真基础模拟1(高一)(已下线)模块五 专题1 全真基础模拟1(北师版高一期中)四川省南充市嘉陵第一中学2023-2024学年高一下学期4月期中考试数学试题江西省上饶市蓝天教育集团2023-2024学年高一下学期期中考试数学试题
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10 . 已知函数
,
,若函数
有2个零点,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6d6aacd10bf7f558bd70c24ce3f7f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eceb09ecb20215b3efb0908ea4b5e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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