解题方法
1 . 如图所示,在平行四边形
中,
,
,M为
的中点,点N在
上,且
.证明:M,N,C三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46927389fcb9c1ab2d8fb4bc1e60793a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11fed0e4135ea42366959e4e305bd7d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d562c896d69cfa13be4ad8d5f3a731.png)
![](https://img.xkw.com/dksih/QBM/2020/2/11/2396765285163008/2396823335010304/STEM/6ffab142693e4a5f9830c0ee4c8d271b.png?resizew=245)
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2 . 已知平行四边形
中,若
是该平面上任意一点,则满足
(
).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/e37bff09-0338-46ea-9759-17c509c118ee.png?resizew=194)
(1)若
是
的中点,求
的值;
(2)若
、
、
三点共线,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8f76a25cff46e6dce21b266a3363b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa72c594ebe33496fa7b9edf1db5c7e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/e37bff09-0338-46ea-9759-17c509c118ee.png?resizew=194)
(1)若
![](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/febf7413b35cf2889fdb57a6b519087c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6096acdd2d0ce16e1e45397ec5e365d4.png)
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3 . 已知,
.
(1)求
,
在
上的投影;
(2)证明
三点共线,并在
时,求
的值;
(3)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062b00cb0fea7c3ec742e3e04cff0810.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ace585d3cc2e113a0927cdf9e56756a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f134605b8b48aaebce5ebfc06b7467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce2c46509372408074cbf9c7d30b660.png)
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名校
4 . 已知直线l上两个点
,其中O为坐标原点.
(1)若
,求点D的坐标,并确定点D与直线l的位置关系;
(2)已知点B是直线l上的一点,求证:若存在实数m、n,使向量
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a3250dea0fa8753c120925354e2c0e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e19c5029ec8d2b180e61c9235cf23a32.png)
(2)已知点B是直线l上的一点,求证:若存在实数m、n,使向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453fb4c9bbc0d4403ff14f7a5d75e0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f371d431b6c91972b742c426c8a81ef.png)
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解题方法
5 . 如图,设
为
的重心,过
的直线
分别交
,
于点
,
,若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb26800893b48ba93adb08bb27b0828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5eeae67a55af37ed525cf99e645a58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3288630168d66493e57dd88c96c36d93.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/405f4b89-fb6d-4ba0-ba1d-ea30247ae70f.png?resizew=191)
您最近一年使用:0次
2020-03-01更新
|
605次组卷
|
2卷引用:人教A版(2019) 必修第二册 突围者 第六章 第二节 课时2向量的数乘运算
6 . 若平面上三点的坐标分别为
,
,
.
(1)用向量法证明:
、
、
三点共线;
(2)设
是坐标原点,且四边形
是平行四边形,求顶点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115a0c87ac14dbb770c95d74d6e26073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afee0da488f6cb5f94d949ea26ac7eb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36212a7a753aa33a521f0fc27972a9a6.png)
(1)用向量法证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341d9ce62bb00c654b206b35f329740b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
您最近一年使用:0次
2019-11-10更新
|
187次组卷
|
3卷引用:沪教版 高二年级第一学期 领航者 第八章 8.1 向量的坐标表示及其运算(1)
7 . 如图所示,在平行四边形
中,
为
的中点,
为
靠近
的三等分点,求证:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7208dc83c7802ac8587b1d41daa28a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b89b83073eb132190d43a4b49733038c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/f65bf75c-7430-430f-bd9d-8bb464049b71.png?resizew=174)
您最近一年使用:0次
2019-10-09更新
|
1288次组卷
|
2卷引用:人教A版 必杀技 第二章 平面向量 2.3.1平面向量基本定理
名校
8 . 如图,平行四边形ABCD中,E,F分别是AD,AB的中点,G为BE与DF的交点.若
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/d6c07df7-3117-4f63-8487-ad6539a63675.png?resizew=168)
(1)试以
,
为基底表示
,
;
(2)求证:A,G,C三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1887a1513aee097a396e99d7399c4e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3afb528b6095c9db39b8aa899a33427.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/d6c07df7-3117-4f63-8487-ad6539a63675.png?resizew=168)
(1)试以
![](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/4c6cbb6f308715ba2e58c11e61dc7d61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d6d630148aa58959960d8568a66742a.png)
(2)求证:A,G,C三点共线.
您最近一年使用:0次
2020-02-05更新
|
1932次组卷
|
9卷引用:辽宁省锦州市2019-2020学年高一上学期期末数学试题
辽宁省锦州市2019-2020学年高一上学期期末数学试题(已下线)【新东方】双师212高一下辽宁省辽河油田第二高级中学2020-2021学年高一3月开学考试数学试题福建省泉州市鲤城北大培文学校2020-2021学年高一下学期期中考试数学试题(已下线)第9章 平面向量(提高卷)-2020-2021学年高一数学十分钟同步课堂专练(苏教版2019必修第二册)(已下线)专题9.3 向量基本定理及坐标表示(基础练)-2020-2021学年高一数学十分钟同步课堂专练(苏教版2019必修第二册)广西梧州市岑溪市2021-2022学年高一下学期期中考试数学试题云南省保山市腾冲市第八中学2022-2023学年高一下学期期中考试数学试卷江苏省常州市第二中学2023-2024学年高一下学期3月月考数学试卷
名校
9 . 请解决下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/dcc5a7e6-5125-4c09-ab49-0f6e2559cb7b.png?resizew=130)
(1)如图,设点
是线段
的三等分点,若
,
,试用
表示
,并判断
与
的关系;
(2)受(1)的启示,如果点
是
的
等分点,你能得到什么结论?请证明你的结论.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/dcc5a7e6-5125-4c09-ab49-0f6e2559cb7b.png?resizew=130)
(1)如图,设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6942bd9fc5d090de0cfad7022aa32f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84cc63e33fe47da2704cff57d148dde0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e78c9bfaab3d02e6825e5edcba1577e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd90227c4be5ccd621fad5e54a819d0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef7b87f5fc001eea13c5bb3080c9e23.png)
(2)受(1)的启示,如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8fda08285e27627050660656fe6c790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8715a3f984d2627afd7c40c61347b7cb.png)
您最近一年使用:0次
名校
10 . 已知点
,
,
,其中
,
为实数:
(1)若点
在第二或第三象限,且
,求
的取值范围;
(2)求证:当
时,不论
为何值,
,
,
三点共线;
(3)若
,
,且三角形
的面积为12,求
和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32366143230ca122894a4bada7c7b96d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/567fc6dde8cea2eccafe83048ed9b650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e33b8cdc93f58e732a696d6a00c7c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c7eb49a823f757461cd5260757b088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4af733c6432ce382a8a3fc19ef315ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7506cd409fc15693d2fa0f69fcc0464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e37a63ee29fda9396419f2eb9a6a6c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c747e93ed8de8ad9b477e9c08c84441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
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2019-12-09更新
|
249次组卷
|
2卷引用:上海市南汇中学2018-2019学年高二上学期期中数学试题