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1 . 在平面直角坐标系中,已知
的坐标为
,将其绕着原点按逆时针方向旋转
得到
,延长
到
使
,再将
绕原点按逆时针方向旋转
得到
,延长
到
使
,如此继续下去,则点
的坐标为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ae18c3151ef1283fbd7854562fdfc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2960b53c9cba842a29e0bed2242974d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f3055d28708ae8ad656360dfef03ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e24e843f778f53af4f3c9e25faa809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b5039701cd894742e00f532b73f8b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996bc6f000889d293aac74becc202fe2.png)
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2022-08-28更新
|
299次组卷
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4卷引用:湖南省长沙市第一中学2021-2022学年高一上学期入学考试数学试题
湖南省长沙市第一中学2021-2022学年高一上学期入学考试数学试题(已下线)第02讲 等差数列及前n项和(练)(已下线)4.3.1.2 等比数列的性质及应用(练习)-2022-2023学年高二数学同步精品课堂(人教A版2019选择性必修第二册)新疆维吾尔自治区乌鲁木齐市第六十八中学2024届高三下学期2月月考数学试题
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2 . 光线从如图所示的角度照射到平面镜上,然后在两平面镜之间来回反射,已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4b6ffec3d56ec3af80f426b719cccc.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d02d80d4e2f6f984036bd22a1a2077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd26d723aacc89ed7052f84f05a8868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4b6ffec3d56ec3af80f426b719cccc.png)
![](https://img.xkw.com/dksih/QBM/2022/8/24/3051581032407040/3054416255418368/STEM/3f53d8be52fd495181d6c9c7c475b692.png?resizew=225)
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3 . 在某种浓度的盐水中加入“一杯水”后,得到新的盐水,它的浓度为
,又在新盐水中加入与前述“一杯水”的重量相等的纯盐后,盐的浓度变为
,那么原来盐水的浓度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9fd62e62750b30638385031737f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396ede97123cfc930b94910ba6f2c18d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-08-28更新
|
85次组卷
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2卷引用:湖南省长沙市第一中学2021-2022学年高一上学期入学考试数学试题
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4 . 如图,若锐角
内接于
,点
在
外(与点
在
同侧),则下列三个结论:①
;②
;③
中,正确的结论为( )
![](https://img.xkw.com/dksih/QBM/2022/8/13/3043490821521408/3044277771739136/STEM/063db13a3fa24143a5c3f616e618da94.png?resizew=122)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e456bbd46ccd5e81628ad440c5be83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55be11de060a71ef7540df96c07632ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a3ddbed54b4179d0e46c90527fde9f.png)
![](https://img.xkw.com/dksih/QBM/2022/8/13/3043490821521408/3044277771739136/STEM/063db13a3fa24143a5c3f616e618da94.png?resizew=122)
A.①② | B.②③ | C.①②③ | D.①③ |
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解题方法
5 . 如图,半径为1的光滑圆形轨道圆
、圆
外切于点
,点
是直线
与圆
的交点,在圆形轨道
、圆
上各有一个运动质点
,
同时分别从点
、
开始逆时针绕轨道做匀速圆周运动,点
,
运动的角速度之比为2:1,设点
转动的角度为
,以
为原点,
为
轴建立平面直角坐标系.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/16/a3caae4b-8289-42c1-947d-668cd04ac031.png?resizew=174)
(1)若
为锐角且
,求
、
的坐标;
(2)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/16/a3caae4b-8289-42c1-947d-668cd04ac031.png?resizew=174)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5bb3cfc78d9bc2316c66f79c45955e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
您最近一年使用:0次
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583次组卷
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3卷引用:辽宁省沈阳市沈河区第二中学2021-2022学年高三数学暑假验收试题
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6 . 从
四个数中任取两个不同的数(记作
)构成一个数组
(其中
,且将
与
视为同一个数组),若满足:对于任意的
和
都有
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4279dbc33f122caee8504fafb22772e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e9f300af2c7392af58d50f3f1a9867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e31e2ce8fc14401267bef4ea94ea511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd0de6b77222d7e31d17c9b208cb99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69760c2ac8f71c7a142ac7ad0c58ce38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde8f7370270207f016844e535069d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116568a72c9ac5391e78a348a1e49e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a91089ff94d91576f03ae398c925bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91d0f9b4046dfedc56672c09210ad051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
A.10 | B.6 | C.5 | D.4 |
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7 . 某旅游公司有两种客车,1辆中巴车与4辆小客车一次可以搭载46名乘客,2辆中巴车与3辆小客车一次可以搭载57名乘客,该公司用3辆中巴车与6辆小客车,一次可以搭载乘客( )
A.129名 | B.120名 | C.108名 | D.96名 |
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8 . 一客轮沿长江从A港顺流到达B港需6小时,从B港逆流到A港需8小时,一天,客轮从A港出发开往
港,2小时后,客轮上的一位旅客的帽子不慎落入江中,则帽子漂流到B港需要( )小时.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.48 | B.32 | C.28 | D.24 |
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9 . 《算法统宗》是中国古代数学名著,作者是我国明代数学家程大位.在《算法统宗》中记载:“以绳测井,若将绳三折测之,绳多4尺,若将绳四折测之,绳多1尺,绳长井深各几何?”译文:“用绳子测水井深度,如果将绳子折成三等份,井外余绳4尺;如果将绳子折成四等份,井外余绳1尺.问绳长、井深各是多少尺?”设井深为
尺,根据题意列方程,正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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10 . 下列说法中,错误的有( )
①绝对值等于它本身的数有两个,是0和1;
②一个有理数的绝对值必为正数;
③4的相反数的绝对值是4;
④任何有理数的绝对值都不是负数.
①绝对值等于它本身的数有两个,是0和1;
②一个有理数的绝对值必为正数;
③4的相反数的绝对值是4;
④任何有理数的绝对值都不是负数.
A.1个 | B.2个 | C.3个 | D.4个 |
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