1 . 已知数列
满足
(
且
),则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec805491b68bcd47219f79e69e26b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
A.![]() ![]() |
B.若数列![]() ![]() |
C.数列![]() ![]() ![]() |
D.当n是奇数时,![]() |
您最近一年使用:0次
2023-07-08更新
|
1046次组卷
|
5卷引用:福建省宁德第一中学2020-2021学年高二上学期开学检测数学试题
名校
解题方法
2 . 已知
,
均为锐角,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7acaeb95c6058a242f0131946f4f005a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ca3f0a4b2d06539e74594736881aaa.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-01-29更新
|
713次组卷
|
12卷引用:江苏省南京师大附中2019-2020学年高一下学期期中数学试题
江苏省南京师大附中2019-2020学年高一下学期期中数学试题巩固练13 两角和与差的正切-2020年【衔接教材·暑假作业】新高二数学(人教版)江苏省扬州中学2020-2021学年高一下学期期中数学试题(已下线)5.5 三角恒等变换(精练)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第一册)(已下线)第五章 三角函数 专题3 三角函数的给值求角问题-2021-2022学年“高人一筹”之高一数学“痛点”大揭秘(人教A版2019必修第一册)江苏省南京市秦淮中学2021-2022学年高一下学期期中数学试题江苏省苏州市南京航空航天大学苏州附属中学2022-2023学年高一下学期6月月考数学试卷(已下线)【第一课】5.5.1课时2 两角和与差的正切公式(已下线)8.2.2 两角和与差的正弦、正切(2)-【帮课堂】(人教B版2019必修第三册)(已下线)模块一 专题4 三角恒等变换 讲 (苏教版)(已下线)专题02 三角恒等变换题型归纳-《期末真题分类汇编》(江苏专用)(已下线)专题03 恒等变形拆角归类(1) -期末考点大串讲(苏教版(2019))
解题方法
3 . 《九章算术》是一本综合性的历史著作,全书总结了战国、秦、汉时期的数学成就,标志着中国古代数学形成了完整的体系.在书中的《商功》章里记录了“方亭”的概念,以下是一个“方亭”的三视图,则它的表面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/c1ae4552-83dd-4a1b-beb7-9fa18580dee2.png?resizew=230)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/c1ae4552-83dd-4a1b-beb7-9fa18580dee2.png?resizew=230)
A.![]() | B.108 | C.![]() | D.50 |
您最近一年使用:0次
4 . 已知椭圆
,点
在椭圆上,如图,用
表示椭圆在点
处切线的单位向量.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/198f7b15-d256-45b8-8ad4-3cc9057793bf.png?resizew=120)
(1)设
,求
的最大值;
(2)是否存在定圆
,使得圆
的任一切线与
的交点
满足
,若存在,求出圆
方程,若不存在,请说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a6e483672a226118dff5a39aa28449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4fbb5a4568dd3e4baec9f8358552b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e8744362c6e224146461b97faf9821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/198f7b15-d256-45b8-8ad4-3cc9057793bf.png?resizew=120)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75874285daf265905257368573ded035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)是否存在定圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a21698cc2ceabd28d995692ab2bfc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
5 . 如图,在
中,
于点
,
于点
,
为
边的中点,连接
、
、
,则下列结论:①若
,则
;②若
,则
;③若
,则
为等边三角形;④若
,则
.其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3f843b83e62bab294988a7ea134a63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ffdf36ba9697d1fe3376a854c26c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55468740d16e56ab5107b9b90a44bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857f848e92a8e900d742cf90314b1ee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c284ccb6f4ee7a8690013d2ce16e226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8fd793511c7f18df93baea6c2cc9df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/3a94ed2c-7357-4149-adaa-a76e976fa5f7.png?resizew=160)
A.①②③ | B.①③④ | C.①②④ | D.②③④ |
您最近一年使用:0次
6 . 如图入口进入,沿框内问题的正确判断方向,最后到达的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/b105ab4a-dcbd-4d5e-8cff-2a9791ee7e6f.png?resizew=582)
A.甲 | B.乙 | C.丙 | D.丁 |
您最近一年使用:0次
7 . 如图,在
轴上方,平行于
轴的直线与反比例函数
和
的图象分别交于
、
两点,连接
,过
点作
交
轴于
点,若平行四边形
的面积为12,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54cec401b13d837b0cc8040d15a7a37f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb79a1b0c6dc78e6de17de6bed477fb1.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/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b0f2c0352a94898281927fa8cb7a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a1640802834338873fda4650f2e621.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/5889f01c-561d-4161-ad6e-e2e529ed60d8.png?resizew=180)
A.12 | B.-12 | C.6 | D.-6 |
您最近一年使用:0次
8 . 如图,若
为正整数,则表示
的值的点落在( )
![](https://img.xkw.com/dksih/QBM/2023/10/14/3345962362314752/3347423293464576/STEM/8bec73e231534815b3281285f243d99a.png?resizew=230)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce54976bfbdfb618cc5e268b9a5be7ce.png)
![](https://img.xkw.com/dksih/QBM/2023/10/14/3345962362314752/3347423293464576/STEM/8bec73e231534815b3281285f243d99a.png?resizew=230)
A.段① | B.段② | C.段③ | D.段④ |
您最近一年使用:0次
9 . 一个容器盛满酒精,第一次倒出10升后,用水加满,第二次倒出6升后,再用水加满,这时容器内的酒精与水的体积之比为7:13,则这个容器的容积为( )
A.18升 | B.20升 | C.24升 | D.30升 |
您最近一年使用:0次
10 . 如图,用6个全等的三角形拼成一个内外都是正六边形的图形,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6877ef28e231e69cfbef3907d367743.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87f9586b708869fd7186e75a75c1dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26e32412868f3dcb5cad62c8a836778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6877ef28e231e69cfbef3907d367743.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/50c4a305-2880-4f88-8b44-94158ac18f52.png?resizew=161)
您最近一年使用:0次