名校
1 . 已知向量
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c3dbb9f9b5e6b13413ee8e8df03840.png)
A.若![]() |
B.向量![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若点G为三角形ABC的重心,则![]() |
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2022-05-17更新
|
913次组卷
|
2卷引用:浙江省衢州市开化中学2021-2022学年高一下学期5月教学检测数学试题
解题方法
2 . 已知
,设函数
,
,若当
对
恒成立时,
的最大值为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a252f0d77593b7793db98be060c41b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64b1691ea835e58baf9fb37c88bd405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0f7f97cd2bba703d8011303551f30e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cb8083f285a27b16ff491861d42f97f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64da75a02173c2a5eb40f4c68d0f4f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff5bb943e2d1bf24e53e81739a891a0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 如图,已知边长为1的正方形
是线段
上的动点(包括端点),
分别是
上动点,且
分别是
中点,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/dcf336a8-ce19-4f8a-a0b7-f870e4b121bf.png?resizew=143)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462d9d51496fa5250f55e7368111e056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c3cc1f331dbb2248b0829039df7f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a69c4757b2b8091e189e5dd116aa5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82812a8606dac22d9d492727ce9c4b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/dcf336a8-ce19-4f8a-a0b7-f870e4b121bf.png?resizew=143)
A.![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2022-05-07更新
|
1240次组卷
|
2卷引用:浙江省杭州地区(含周边)重点中学2021-2022学年高一下学期期中数学试题
名校
解题方法
4 . 如图所示
的两边
,
,设
是
的重心,
边上的高为
,过
的直线与
,
分别交于
,
,已知
,
;
的值;
(2)若
,
,
,求
的值;
(3)若
的最大值为
,求边
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f322f8f148fbbaa38b6c0218ae68fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e9a5092afe1af9b0a2eb01c5f25a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587b693b82241eb9c32cdbb96c209f33.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45373166e0a004b3b4d910655d409b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c6d5aeee562064b9bb703fa538413d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d2d153c31e0a4a9ca234ba3331590f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8971f209e5596ccf8a5a983e166f5d52.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a29a364ce73d0abe8bf37f80450f8ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24473546b4e77ce3091dd840f72ccea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2022-05-02更新
|
1577次组卷
|
6卷引用:浙江省温州市知临教育集团2021-2022学年高一下学期期中数学试题
浙江省温州市知临教育集团2021-2022学年高一下学期期中数学试题(已下线)期末押题预测卷02安徽省合肥市第八中学2022-2023学年高一下学期期中检测数学试题(已下线)必修二全册综合测试卷(提高篇)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)湖南省长沙市宁乡市2022-2023学年高一下学期期末数学试题(已下线)第一次月考解答题压轴题十六大题型专练(1)-举一反三系列(人教A版2019必修第二册)
5 . 请先阅读下列材料;在作战中,有经验的步兵往往能通过“跳眼法”估测物体和自己的距离.具体过程如下:第一步,向正前方伸直左手手臂,竖起拇指;第二步,将右眼闭上,靠左眼观察目标,伸直并端平并移动(可以把左眼到左手拇指的距离看成手臂长),使得目标恰好位于拇指左侧边缘处;第三步,伸出的手臂保持不动,闭上左眼,靠右眼观察,大体估计从左手拇指左侧看到的另一物体与目标的距离;最后即可根据该距离以及你手臂长度、两眼间距来计算你到目标的距离.一般自动步枪有效射程为400
,现一人需用自动步枪射击目标P,先采用“跳眼法”预测自己与目标P的距离,此人手臂长60
,双眼间距6
,面朝正北方向,测量时与上述第一步第二步完全相同,第三步用右眼观察时,拇指左侧恰好对准的是参照物Q,参照物Q在目标P的北偏西
,且与目标P的距离为133.2
,(如图所示)
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964980874887168/2970554110435328/STEM/82c747cb-7726-4a19-a5fd-ec3c2bd798ec.png?resizew=177)
(1)求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51386d00d5a6ea4ff3670138d459200d.png)
(2)若此人在A处开枪射击,请问目标P是否在射程范围内?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964980874887168/2970554110435328/STEM/82c747cb-7726-4a19-a5fd-ec3c2bd798ec.png?resizew=177)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51386d00d5a6ea4ff3670138d459200d.png)
(2)若此人在A处开枪射击,请问目标P是否在射程范围内?请说明理由.
您最近一年使用:0次
6 . 点Q在半径为1的圆P上运动的同时,点P在半径为2的圆O上运动,O为定点,P、Q两点的初始位置(如图1所示),其中
,且两点均以逆时针方向运动,当点P转过角度α时,Q转过的角度为2α(如图2所示),其中
且
,G为
的重心,
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964980874887168/2970554110476288/STEM/12885bf4-d3bc-4881-a952-7c6a4a4dc7e5.png?resizew=335)
(1)求证:
为定值;
(2)把三个实数a,b,c的最小值记为
,若
,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84b592b177691f0dd6ef81a4e51b922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941647c1647511a05d56a58f0a21472d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e222c14e46e2fcbb8285eeb18e5ba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964980874887168/2970554110476288/STEM/12885bf4-d3bc-4881-a952-7c6a4a4dc7e5.png?resizew=335)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cb509418dcf444c575a5882190d69c.png)
(2)把三个实数a,b,c的最小值记为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c951bf168dcc320e155db1d766f5b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e518209e8ba64f93b1ebd4503d7c94b5.png)
您最近一年使用:0次
名校
7 . 设
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba3854ab72862536e6888d6ffbcfb2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e9b06154245227fb332950f5602a4b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-04-29更新
|
1908次组卷
|
8卷引用:浙江省杭州学军中学2022-2023学年高二上学期期中数学试题
名校
8 . 已知向量
,若对于满足
的任意向量
,都存在
,使得
恒成立,则向量
的模
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560ee2894ba8c5cee6633430cc8b3b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9989c54fb3d74c241c2a1593df46c31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e87088da41685cc8d433fbbe0e18d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c8a18a00007d219e6f8ca17b3ae85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560ee2894ba8c5cee6633430cc8b3b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b1556bb6b2284919fab2b00dccecba.png)
您最近一年使用:0次
9 . 已知
是
上的任意两个不同的点,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f57bf36e92fae170161eca953aa767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
A.若弦![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若弦![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
名校
10 . 我国古代数学著作《九章算术》方田篇记载“宛田面积术曰:以径乘周,四而一”(注:宛田,扇形形状的田地:径,扇形所在圆的直径;周,扇形的弧长),即古人计算扇形面积的公式为:扇形面
.现有一宛田的面积为
,周为
,则径是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a537910ff09bb621ff9af187ce5ece0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/2022/4/7/2953183833513984/2953804694814720/STEM/8f158d07ce634768bf1b037ef6844251.png?resizew=173)
您最近一年使用:0次
2022-04-08更新
|
703次组卷
|
4卷引用:浙江省绍兴市2022届高三下学期4月高考科目适应性考试数学试题
浙江省绍兴市2022届高三下学期4月高考科目适应性考试数学试题安徽省六安市舒城中学2022届高三下学期仿真模拟(三)理科数学试题(已下线)3.1 三角函数的定义(精练)-【一隅三反】2023年高考数学一轮复习(基础版)(新高考地区专用)甘肃省天水市麦积区2022-2023学年高一上学期期末数学试题