名校
解题方法
1 . 如图,在四边形ABCD中,
,
,
,
,
,F为线段BC的中点,E为线段AD上一动点(包括端点),
,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/8b907f27-1d53-41bb-b3b1-898f66946920.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb92c95de837a21894048a4f27b4c95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2720b26d28a75aa56d6a686e0987be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/748a1748d2a3406ce169782573e064a6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/8b907f27-1d53-41bb-b3b1-898f66946920.png?resizew=139)
A.![]() | B.![]() ![]() |
C.若E为线段AD的中点,则![]() | D.n的最大值为![]() |
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2 . 平面上四点
,
,
,
,满足
,那么下列关系成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd98a41e273bf640e0d567365fd20077.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
解题方法
3 . 衡量钻石价值的4C标准之一是切工.理想切工是一种高雅且杰出的切工,它使钻石几乎反射了所有进入钻石的光线.现有一理想切工的钻石,其横截面如图所示,其中
为等腰直角三角形,四边形BCDE为等腰梯形,且
,
,
,则
( )
![](https://img.xkw.com/dksih/QBM/2022/5/29/2990018058854400/2992049192828928/STEM/14221317-108b-4675-b13a-c9d0b232ecbc.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936c74c9a7edc81c037f4ea795d130bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/939d5f8924f0ff69e6ff5dfe436b53b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef40ed347ff3af5a519d5806de9749f.png)
![](https://img.xkw.com/dksih/QBM/2022/5/29/2990018058854400/2992049192828928/STEM/14221317-108b-4675-b13a-c9d0b232ecbc.png?resizew=159)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2022-06-01更新
|
1156次组卷
|
7卷引用:浙江省杭州市源清中学2022-2023学年高一下学期期中数学试题
名校
4 . 如图所示,等腰梯形
中,
,
,已知E,F分别为线段
,
上的动点(E,F可与线段的端点重合),且满足
,
.
关于x,y的关系式并确定x,y的取值范围;
(2)若
,判断是否存在恰当的x和y使得
取得最大值?若存在,求出该最大值及对应的x和y;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e921f46d90e43f4517c55832b6280f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c3f33f58f50ec2d5f038e620c3294f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1578eb173c8b9a7a124c988f77a690bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c37cb57db83fb57e6a0d3a0afa1127.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a5df115177284576970a912b09ba7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916bb2cc1b29574ff95b47567c59ee0c.png)
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2022-04-03更新
|
1179次组卷
|
8卷引用:高中数学 高一下-6
名校
解题方法
5 . 如图,在
中,点
是
上的点,且
, 且
是
的中点,
与
的交点为
,又
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302ebea00fafd098aaa4bddc1bdae137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18fc4b71e516446037d8c62fedb39560.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
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2021-07-26更新
|
1075次组卷
|
7卷引用:浙江省宁波市北仑中学2020-2021学年高一(1班)下学期期中数学试题
浙江省宁波市北仑中学2020-2021学年高一(1班)下学期期中数学试题(已下线)第23讲 平面向量的基本定理及坐标表示 (讲)- 2022年高考数学一轮复习讲练测(课标全国版)(已下线)10.1 平面向量的线性运算及基本定理(精练)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)(已下线)专题22 平面向量的基本定理的应用-备战2022年高考数学一轮复习一网打尽之重点难点突破(已下线)第35讲 平面向量的基本定理与坐标运算(已下线)第二节 平面向量基本定理及坐标表示(讲)河北省石家庄一中2023-2024学年高一下学期第一次月考数学试题
名校
6 . 设向量
满足
,
,若
,
,则
的最小值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1625e24072a8fe6c277ecfca2c62cdaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4548a1b8cbf5a12417cb53f8a4156107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22905409f038387f0e954a47384b60a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7569cd7e9b31ad838230133b9bc8314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f371d431b6c91972b742c426c8a81ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca259e244385f2799a7eb743a1f812d2.png)
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2020-11-28更新
|
1565次组卷
|
7卷引用:浙江省台州市第一中学2020-2021学年高三上学期期中数学试题
浙江省台州市第一中学2020-2021学年高三上学期期中数学试题(已下线)专题2 平面向量与复数-2021年高考冲刺之二轮专题精讲精析江西省新余市第四中学2021届高三上学期第五次段考数学(理)试题上海市复旦大学附属中学2021届高三高考考前模拟训练数学试题(已下线)模块08 平面向量的坐标表示-2022年高考数学一轮复习小题多维练(上海专用)江西省宜春市丰城中学2022届高三实验班上学期第四次月考数学(理)试题(已下线)第11讲 平面向量- 1
7 . 设向量
,
,
,
是单位向量且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c47c3f1495b6113c457a5c6095e1bb.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524594bf0942ed86f56fc1eee120a81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f858109018e7cd82517d248c6f2fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789c37c41ba820fd97c214c0013f90e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c47c3f1495b6113c457a5c6095e1bb.png)
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10-11高三上·浙江金华·期中
解题方法
8 . 如图所示,
点在
内部,
分别是
边的中点,且有
,则
的面积与
的面积的比为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee7d9f95385876b8ea36f53bd0b1d51d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80651f797ab9dccfd7163c605b091ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://img.xkw.com/dksih/QBM/2013/12/9/1571428584693760/1571428589846528/STEM/fbb7437485ea402883db9fb81a87dcc3.png?resizew=147)
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