1 .
中,a,b,c分别是内角A,B,C的对边,O为其重心,
,
,
分别是边a,b,c上的高.若
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5efe57aca2f76116c2f62fb6f224be26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ffb82aa1614cd1bc28940b1a7252fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a13393b5c809072cc7c6e4adc5f0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98008453bfd6b3469a0f8f954a1037f7.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
2 . 如图,已知A,B,C共线,且向量,
,则
您最近一年使用:0次
2023-06-17更新
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378次组卷
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3卷引用:福建省三明市2022-2023学年高一下学期4月期中考试数学试题
2023高一·全国·专题练习
名校
3 . 如图:在
中,
,
,
与
交于点
,设
.
(1)若
,求
,
的值;
(2)在线段
上取一点
,线段
上取一点
,使得
过点
,设
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541f0de8478633dd6de0b96653380351.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d24514cfd797f21116cacd6d636df4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211429ce394297f664f6b8e16edec714.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/26/702bdf00-2322-4219-8963-07aa0db519f2.png?resizew=257)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6473fc206d85aa015b2547317ada4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07503227ec732954dc608f62a56b5ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3ba58abc9738c443230a8bc0178ab5.png)
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解题方法
4 . 如图,平面四边形ABCD中,其中
,
,
,且
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d60757674370d947f394eee28fc88c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b0f0cdb98fe345dccfa96b3be72b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6834a0601cbb9cb4b6065d25c370216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c736eaaf830b47fc97bef2b973b8a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e05e2052ee3020b977b231e01bdd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/24/67ee017a-7353-4a67-bc67-220f91a3c245.png?resizew=179)
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5 . 在
中,点
分别在边
和边
上,且
,
,
交
于点
,设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/86a68868-d406-49ff-b982-39d246a4c1c7.png?resizew=153)
(1)试用
,
表示
;
(2)在边
上有点
,使得
,求证:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59802bde1dc59ba9000157b08463b2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11fbc3a1f1e848cf1349b9327be8607d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71813d6916acdd4a80d8d270ab414a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f9e35b2d86b09076806917cbedc3c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/86a68868-d406-49ff-b982-39d246a4c1c7.png?resizew=153)
(1)试用
![](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/471ac0f42d01c6d6e094b63628586e4d.png)
(2)在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0087924c5825b480965daabfeea630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfc59d1de5055c3939295ec953ef3a8.png)
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2023-05-11更新
|
806次组卷
|
3卷引用:福建省连城县第一中学2022-2023学年高一下学期3月月考数学试题
名校
解题方法
6 .
中,点M为边AC上的点,且
,若
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db638038a5ed4b4f743b6dec8ff9fb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f062c1ced859002ba975ae97c27cb608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d285e611381e448100f126c4d7a9b78.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-05-02更新
|
315次组卷
|
3卷引用:福建省福宁古五校联合体2022-2023学年高一下学期期中质量监测数学试题
名校
解题方法
7 . 如图,在
中,
,
,
为
上一点,且满足
,若
,
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1371fe98a65d8ebd840c8d98346b6d15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad33c74b50431cc2c876997a0f78ce8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da18267294924c440b4a5e1d08dd928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf13d86d78123424a56ef6ccb839bef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6897c3746574e32d50ebc92f872cd7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596f68ba4b746cab4b2c26ffce554b5a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-05-02更新
|
1125次组卷
|
4卷引用:福建省福州第八中学2023-2024学年高一下学期期中考试数学试卷
福建省福州第八中学2023-2024学年高一下学期期中考试数学试卷天津市五所重点学校2022-2023学年高一下学期期中联考数学试题(已下线)高一数学下学期第二次月考02(范围:平面向量,解三角形,复数,立体几何)新疆石河子第一中学2022-2023学年高一下学期5月月考数学试题
解题方法
8 . 已知点
是
所在平面上一点,且满足
,设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a2d1ffa46886c20d04fe9bc5a47dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e507d3941363e9dbeac8be35134727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
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解题方法
9 . 在△ABC中,
,
,直线AM交BN于点Q,若
,则λ=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad819abc817030381444a01b3e5fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c5f7a77d3b548b0d8181e8909166b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dabe81ebb214db6c0dbbab94ef2c460.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
10 . 已知
与
不共线,
是一组基底,则实数
的取值范围是______ .
![](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/1fb1f3306bc7c200eea91a5ee6a8afe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2023-04-15更新
|
361次组卷
|
6卷引用:福建省福州市福清市高中联合体2022-2023学年高一下学期期中考试数学试题
福建省福州市福清市高中联合体2022-2023学年高一下学期期中考试数学试题(已下线)6.3.1平面向量基本定理-高频考点通关与解题策略(人教A版2019必修第二册)(已下线)专题1.4 平面向量基本定理及坐标表示-重难点突破及混淆易错规避(人教A版2019必修第二册)(已下线)6.3.1 平面向量基本定理——课后作业(提升版)(已下线)专题 01 空间基底及综合应用(1)(已下线)专题 01 空间基底及综合应用(1)