如图,平行四边形
中,
,
,
,点
分别为
边的中点,
与
相交于点
,记
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/0133f14e-8403-47fc-a37a-1860ba93874e.png?resizew=204)
(1)用
表示
,并求
;
(2)若
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac31b9badf70a20d3b7d15f72da16d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](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/2023/1/5/0133f14e-8403-47fc-a37a-1860ba93874e.png?resizew=204)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6cbb6f308715ba2e58c11e61dc7d61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f102e09983c725136c7f79226d2274.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/096c7caef26e2b70590d65aba92da926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
18-19高一上·福建厦门·期末 查看更多[3]
【市级联考】福建省厦门市2018-2019学年高一第一学期质量检测(期末)数学试题【全国百强校】安徽省六安市第一中学2018-2019学年高一下学期第二次阶段检测数学(文)试题(已下线)6.3.1平面向量基本定理(分层作业)-【上好课】
更新时间:2019-02-02 08:17:07
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,已知M是边
的中点,
,线段
与
交于点O.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/28b6b1d8-16b4-4b39-b1ee-ed93646607dc.png?resizew=177)
(1)若
,求
的值;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ee9f129ef243a5d995ad6925e7e30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/28b6b1d8-16b4-4b39-b1ee-ed93646607dc.png?resizew=177)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a09b217612cd260c67b1a3abe3b105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df7c6c24d94fc098fee12e47a050cdb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634bcf3a995960a16e29276e46cc6268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,在
中,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/fdd98dd6-cc10-4d70-a4a2-477b894d4b69.png?resizew=148)
(1)若
,求
的最大值.
(2)若
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad819abc817030381444a01b3e5fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79f8f4051b5dbc94620f44d93a862d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d2919e5bd26b5e9be672a3ff7604cd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/fdd98dd6-cc10-4d70-a4a2-477b894d4b69.png?resizew=148)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4c41a83255a091e4cdf5c1150224842.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03234cdf2a49c059aa98e5384f691af5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555503767f3e0f11dfae5a31c2a85fc0.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】在ΔABC中,P为AB的中点,O在边AC上,BO交CP于R,且
,设AB=
,AC=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
,
表示
;
(2)若
,求∠ARB的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59d93b6db4c92a6e6acebf7ef17a536f.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/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd5844deaa2a8cdda9477bcbf76c459.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47b94ee695834dff2a2ebae647b7267.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图1所示,在
中,点D在线段BC上,满足
,G是线段AB上的点,且满足
,线段CG与线段AD交于点O.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/94c72c6f-fe76-4b2d-8ec8-64a00d10272c.png?resizew=336)
(1)试用
,
表示
和
;
(2)如图2所示,过点O的直线与线段AB,AC(不与端点重合)分别交于点E,F,设
,
,求xy的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0cf3de61b5492989ae2002e19de770a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe7de3ddd40a45b5d73992419d73ab3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/94c72c6f-fe76-4b2d-8ec8-64a00d10272c.png?resizew=336)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f1b06a56fc382feed28e01f1ad102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304a7f07db2ec637baadf8f0ab91c85c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4eba0286925d493afca6f73959d9f8f.png)
(2)如图2所示,过点O的直线与线段AB,AC(不与端点重合)分别交于点E,F,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d799dcd1a10fdfffeb26c4df6fcfdfd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe832c4d2756650956b3291af7d607c.png)
您最近一年使用:0次