名校
1 . 如图,在平行四边形
中,点
,
分别在
,
边上,且
,
,若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d19e795e7c26b569a5ec100ac7fcdb8.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b6a742dbacdab5aaa298007663dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0192c8bc48647ec635a1720311e18631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6565069f6da2523116c7d7ad2f8fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3bfb4b6bbae2e6c93986d136100479d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3ebbff4243c55956aaff429fae282f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ec24953de20381cadbe2e912244728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d19e795e7c26b569a5ec100ac7fcdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/cd1f5e37-2f51-4124-8554-bba08c4f39fa.png?resizew=167)
您最近一年使用:0次
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848次组卷
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8卷引用:安徽省皖北县中联盟2022-2023学年高二上学期10月联考数学试题
名校
解题方法
2 . 如图,在
中,
,
是
上的一点,若
,则实数
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/cbe802e4-e70a-4b05-be54-d327b990f84d.jpg?resizew=253)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433143e6245ca2691c53167b2e9d07eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a642e335c75912a0c11fe9a19bbdaed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab4717e4827480f0f6f4ded85e52eab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/cbe802e4-e70a-4b05-be54-d327b990f84d.jpg?resizew=253)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-10-19更新
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3卷引用:湖南省常德市桃源县第一中学2022-2023学年高三上学期9月月考数学试题
名校
3 . 在
中,
,
,
是
中点,
在边
上,满足
,线段
和
交于
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35465a18a817799ce068b582ad66501.png)
_________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1e8dc3576d1dfb58ffb114c8d2c3ad.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93edbd735d79524f463085a4e9093bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eef08aecd31a5cf33b3c98946de886a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1368d768513e7f6a9d043856b03da0d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35465a18a817799ce068b582ad66501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1e8dc3576d1dfb58ffb114c8d2c3ad.png)
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名校
解题方法
4 . 已知在矩形
中,
,线段
交于点
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ec642018e5dee22d061d144ef86391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a1376bd626327af0a224532eaaccb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-10-14更新
|
840次组卷
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4卷引用:江西省重点校2023届高三上学期10月统一调研测试数学(理)试题
名校
解题方法
5 . 在
中,
为
边上的点,当
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822a6a1dfe0641892a270c1eb75f4b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64195e3d04f22579082e973c2a9f80b4.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2022-10-13更新
|
623次组卷
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2卷引用:广东省广州市花都区2023届高三上学期10月调研数学试题
名校
解题方法
6 . 在
中,
,
为斜边
上一点(不含端点),
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
___________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30800bcb030cf5ee97d0e21fbbe8c368.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b803411e826fef958209b3041a605ccf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30800bcb030cf5ee97d0e21fbbe8c368.png)
您最近一年使用:0次
7 . 已知正四面体
的棱长为2,点
是
的重心,点
是线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/ae13c046-a84b-4004-8346-0ba0cf9a66c8.png?resizew=180)
(1)用
表示
,并求出
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/ae13c046-a84b-4004-8346-0ba0cf9a66c8.png?resizew=180)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12043fbdfadbf715bbc7969cdf71a907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6799b234237333b0efa331d98f0374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac86fb41def60231a763706fb644cda.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a89efb10e95245a41f6c7a80189528.png)
您最近一年使用:0次
2022-10-13更新
|
363次组卷
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5卷引用:河南省洛阳市强基联盟大联考2022-2023学年高二上学期10月数学试题
河南省洛阳市强基联盟大联考2022-2023学年高二上学期10月数学试题(已下线)期中押题预测卷(考试范围:选择性必修第一册)(提升卷)-【单元测试】2022-2023学年高二数学分层训练AB卷(人教B版2019)(已下线)6.1.2 空间向量的数量积(练习)-2022-2023学年高二数学同步精品课堂(苏教版2019选择性必修第二册)(已下线)第02讲 1.1.2空间向量的数量积运算(7类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)甘肃省武威市天祝一中、民勤一中、古浪一中2022-2023学年高二下学期期中数学试题
8 . 在
中,点D满足
.记
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05bf68d341deec1473d382b6dace283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c763aa284981fe26d6b990f1608bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6abb7f79e3864081e296e7ee6db3d1e2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-10-12更新
|
323次组卷
|
2卷引用:江西省百校联盟2023届高三上学期10月联考数学(理)试题
9 . 如图,在三棱锥
中,点G为底面
的重心,点M是线段
上靠近点G的三等分点,过点M的平面分别交棱
,
,
于点D,E,F,若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d120dea83b3779706b41a32f503f23ce.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757e3a6e3485de706a64977a1612641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7fd30e6076e926b4065cb0022d3d99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531541c87dc5fce3a3b1c3a41922ebb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d120dea83b3779706b41a32f503f23ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/009ec3c9-04a6-45f2-a6da-9607962ba46f.png?resizew=167)
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|
865次组卷
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8卷引用:河南省洛阳市强基联盟大联考2022-2023学年高二上学期10月数学试题
河南省洛阳市强基联盟大联考2022-2023学年高二上学期10月数学试题河北省故城县高级中学2022-2023学年高二上学期第一次月考数学试题安徽省马鞍山市第二十二中学等校2022-2023学年高二上学期阶段联考数学试题辽宁省鞍山市岫岩满族自治县高级中学2022-2023学年高二上学期月考(一)数学试题(已下线)期中押题预测卷(考试范围:选择性必修第一册)(拔高卷)-【单元测试】2022-2023学年高二数学分层训练AB卷(人教B版2019)江苏省淮安市洪泽湖高级中学2022-2023学年高二下学期第一次月考数学试题辽宁省铁岭市昌图县第一高级中学2023-2024学年高二上学期9月月考数学试题江苏省南京市田家炳高级中学2022-2023学年高二下学期期初考试数学试题
10 . 如图所示,在
中,点D是边BC的中点,点E是线段AD的中点.过点E的直线与边AB,AC分别交于点P,Q.设
,
,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ee44c8ad5792736787bb903ca273db.png)
![](https://img.xkw.com/dksih/QBM/2022/10/10/3084552225349632/3085931629084672/STEM/99cbf902e79b456d83a8b162745b5770.png?resizew=199)
(1)试用
与
表示
、
;
(2)求证:
为定值,并求此定值;
(3)设
的面积为
,
的面积为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93179982551da01266d5f1bc177fb4ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe91df8a5a97bf49ab8004f07f64e908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ee44c8ad5792736787bb903ca273db.png)
![](https://img.xkw.com/dksih/QBM/2022/10/10/3084552225349632/3085931629084672/STEM/99cbf902e79b456d83a8b162745b5770.png?resizew=199)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228f4ddbb8959f904d71259be7c6ab36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1da92a2fc2ce861e82f7192fe4e648f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b680f91c4a693cc9ab2c23f2e9114ce.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac8a4086cd8af00e89c57fdfd905114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd72016a9855cbf0056ff732fe872612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
您最近一年使用:0次
2022-10-12更新
|
444次组卷
|
3卷引用:江西2023届高三联合测评卷数学(文)试题