如图,
,
是两个不共线的向量,
,试用
,
表示向量
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc3e6fca91745857449106e786d6a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec64476aaca08de0808afda3618109c.png)
![](https://img.xkw.com/dksih/QBM/2021/11/11/2849048100347904/2849144322031616/STEM/c5893f07-a726-4a77-9816-4e398d3878f2.png?resizew=202)
20-21高一·全国·课后作业 查看更多[6]
(已下线)9.3.1 平面向量基本定理(已下线)9.2.2 向量的数乘(已下线)第03讲 向量的数乘-【帮课堂】2021-2022学年高一数学同步精品讲义(苏教版2019必修第二册)苏教版(2019)必修第二册课本习题 习题9.3(1)苏教版(2019)必修第二册课本习题9.2.2 向量的数乘(已下线)专题05 平面向量基本定理-《重难点题型·高分突破》
更新时间:2021-11-11 19:41:52
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解答题-证明题
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较易
(0.85)
解题方法
【推荐1】设
为
的重心,
为
的重心,过
作直线
分别交线段
,
(不与端点重合)于
,
.若
,
.
(1)求证
为定值;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81722445de00f3cfcc3cb97e45b0d8dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1b68f13fed987f5209197de7bc8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81722445de00f3cfcc3cb97e45b0d8dd.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e132194c1ff4c62aadf52561be1c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28c4eaa1e5dd08305162415799a063d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e17e3fee22f1387717efa36456a196.png)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f0b84ee4ed90face0993d4f4dda379.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
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【推荐2】如图,已知
是边长为2的正三角形,点
、
、
是
边的四等分点.
的值;
(2)若
为线段
上一点,且
,求实数
的值;
(3)若
为线段
上的动点,求
的最小值,并指出当
取最小值时点
的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822fcf0c42e4c2ec7483766400964897.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aba947934b05caae8b0c1fb1a522a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a78ee3ad1bb80ac6b38d85db255676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af60dbda52ecc12748d1dab69b156be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab7aaa871ceb78e5b80b531a7cf4f1c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab7aaa871ceb78e5b80b531a7cf4f1c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解题方法
【推荐1】如图,在
中,设对角线
,
,试用
、
表示
、
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e55362a3a1f592e6551851c42d3078.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ac05b0c30047ef49d5c9e334003dbd.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/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89265cbe3abc6b966ce8967fead448b.png)
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解答题-作图题
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解题方法
【推荐2】已知
,
为两个非零向量,
(1)求作向量
,
;
(2)当向量
,
成什么位置关系时,满足
?(不要求证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
(1)求作向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3143307ad0ba4a631eac04e814993655.png)
(2)当向量
![](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/b94c23f6f5c94f8626ec8cdb0f15c8f2.png)
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解题方法
【推荐1】如图,
中,AB边的中点为P,重心为G.在
外任取一点O,作向量
,
,
,
,
.
,
表示
.
(2)试用
,
,
表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91174b2336306191ba275a87864172b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4b9dda541ca792577227f3014ddc6a.png)
![](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/91174b2336306191ba275a87864172b7.png)
(2)试用
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4b9dda541ca792577227f3014ddc6a.png)
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解题方法
【推荐2】如图,在平面内将两块直角三角板拼在一起,已知
,
.记
,
,试用
,
表示向量
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c284ccb6f4ee7a8690013d2ce16e226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc03a3ba496faee748a8d63e5d4fa92.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/304a7f07db2ec637baadf8f0ab91c85c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1070a28cb9cb8553c29747d1993b16.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/ea34ba9f-8fad-4b60-a8c9-076df796a5d8.png?resizew=205)
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解题方法
【推荐1】如图所示,设
是
三边上的点,且
,
,
,若
,
,试用
将
表示出来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9369aed2d8309af46ac3eaffb9cce537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530d80361a098d127839f8a581955a03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b94fc8dd87d543c27624771075062fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/728e5d9f46f87f6693261ebc41c7abcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7a93a1399ff7a2bde342652479241b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae92f0c583cc9daf980a8621ad96aef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbdc2c08884512c706e2b377ce2148bc.png)
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【推荐2】如图所示,平行四边形
中,
,
,
分别是
的中点,
.试用
表示向量
与
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629fca16b1a1838cc2dfbb1981c0eefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522a39169590957333775a005b747fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc936ca31309f842a5074ff01622c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac31b9badf70a20d3b7d15f72da16d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558098da135bc12e7fdca05d14c3848e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb45d79ed37ed115c473f52c60d02a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa243c5f5f5db040d7c047b1c3a19d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f13dfe6217069ec05434a87d0e7bfca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/4be0ad34-3e51-4443-a3c9-2acf910cc763.png?resizew=328)
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