解题方法
1 . 已知点
,求
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c1e9ce211e66c159d5ae2f185ecbd7.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d4f2186e25dd31c5d47f8de4ccb251.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606813e8585f653a2fd32694adea1eb7.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c1e9ce211e66c159d5ae2f185ecbd7.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d4f2186e25dd31c5d47f8de4ccb251.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d401876b078e318413b8ad876c54b7be.png)
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解题方法
2 . 如图,在梯形
中,
,
,
,点
分别为线段
,
上的三等分点,点
是线段
上的一点.
的值;
(2)求
的值;
(3)直线
分别交线段
于M,N两点,若B,N,D三点在同一直线上,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762f99edee52c4984ba077facc51d8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f864244952b60f3648f08a19268efae9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/b8bad16b7cdf8c638cd324f5be5d834f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa64009879efc50d310d24052fe5c8.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4572fa04373cd8e1e005a2f34f3953.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c1292487839550e3724ba9c2eee94e.png)
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3 . 如图,在
中,已知
,M是
的中点,N是
上的点,且
相交于点P.设
.
,试用向量
表示
;
(2)若
,求实数x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d87aaec0ff6ebe697a942feaed39ddf.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/04a66f3b2ee90819abbd18dcf0543a8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ba495e8f9fe02229a4248fdbfb4710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fac9575a5985527e283f7295fdaf72c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d6c25c8513bd15674f632b46d5a926.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e4ece75fe9b8555909be5a00d2b7af0.png)
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解题方法
4 . 在平行四边形
中,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b663c1ab33d181006069f2ac507283d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6a63b6f0c31776e339fc8237c7d893.png)
A.4 | B.![]() | C.1 | D.![]() |
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5 . (1)已知
=(k,2),
=(1,2k),
=(1-k,-1),且相异的三点A,B,C共线,求实数k的值.
(2)已知向量
,
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4051a3d29e6910a9272f0e04d350f88c.png)
,且
=
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
(2)已知向量
![](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/4051a3d29e6910a9272f0e04d350f88c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e737f11a86a5c5eacbb3e9a87abf1437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7efc342fe2e7c9e0ce7a836e512ef389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1768d1918c2e68b5df05d2dfc39633a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27119d215d33b90a544869eb4ecd646c.png)
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6 . 如图,已知
中,点
关于点
的对称点为
在线段
上,且
和
相交于点
.设
.
(1)用
表示向量
.
(2)若
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61376a29e8012595e56a418ee8c507f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211429ce394297f664f6b8e16edec714.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/32a69356-847e-42a7-a27f-577e80e2506a.png?resizew=151)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de92206d9c5afc2056f16086346a877e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0421480e99ea91807e36a113237ba8ae.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c70d3674afde7efd0bbafc68e50b828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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7 . 设
是平面内一个基底,则下面四组向量中,能作为基底的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a341ba62373f3286b0a3425cbc3f79.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
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8 . 数学家欧拉发现任意三角形的外心、重心、垂心,依次位于同一直线上,而且重心到外心的距离是重心到垂心距离的一半,后人称这条线为欧拉线,已知外心
,垂心
,则重心
的坐标为_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b014a055c4b20efce372988223c67e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4e15aeb6286e6836c664aa9b0cca6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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9 . 在
中,
分别是边
的中点,点
为
的重心,则下列结论中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927456b0989846a2f1573844bbaa2105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746ee1515a178948b04f535705c6f738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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10 . 已知正方形ABCD的边长为4,
为
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e208505c7f0d6fee97c5f0a08e945389.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e208505c7f0d6fee97c5f0a08e945389.png)
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