名校
1 . 已知无穷数列
(
)的前n项和为
,记
,
,…,
中奇数的个数为
.
(1)若
,请写出数列
的前5项;
(2)求证:“
为奇数,
,3,4,
为偶数”是“数列
是严格增数列的充分不必要条件;
(3)若
,
2,3,
,求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67fd0eb54561cd1df683a08cf049bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64810519cca09d8bad1e5c0720b6f70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccae0d8c29b807d2844ba1e61633a6e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求证:“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/391621c6a983318f5eb3085ede2cc8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14be3a67d7ff26e1850b3d5f891b7e9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7a172e3de92f315198a515eef6ebbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b1e185d6a0ab350cdc947beeb82040.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67fd0eb54561cd1df683a08cf049bfc.png)
您最近一年使用:0次
2022-11-25更新
|
425次组卷
|
5卷引用:期中真题必刷压轴50题专练-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)
(已下线)期中真题必刷压轴50题专练-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)(已下线)专题4.1 数列(4个考点七大题型)(1)上海市建平中学2023届高三上学期期中数学试题上海市第二中学2024届高三上学期期中数学试题(已下线)微考点4-1 新高考新试卷结构压轴题新定义数列试题分类汇编
2 . 对于项数为m的数列{an},若满足:1≤a1<a2<⋯<am,且对任意1≤i≤j≤m,aiaj与
中至少有一个是{an}中的项,则称{an}具有性质P.
(1)分别判断数列1,3,9和数列2,4,8是否具有性质P,并说明理由;
(2)如果数列a1,a2,a3,a4具有性质P,求证:a1=1,a4=a2a3;
(3)如果数列{an}具有性质P,且项数为大于等于5的奇数.判断{an}是否为等比数列?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf9fc9e8c9940547678ff7934363f52.png)
(1)分别判断数列1,3,9和数列2,4,8是否具有性质P,并说明理由;
(2)如果数列a1,a2,a3,a4具有性质P,求证:a1=1,a4=a2a3;
(3)如果数列{an}具有性质P,且项数为大于等于5的奇数.判断{an}是否为等比数列?并说明理由.
您最近一年使用:0次
2022-11-06更新
|
420次组卷
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7卷引用:专题06数列必考题型分类训练-3
(已下线)专题06数列必考题型分类训练-3上海市虹口区2022届高三二模数学试题(已下线)第08讲 等差、等比数列-2(已下线)模块九 数列-2上海市位育中学2023届高三下学期开学考试数学试题(已下线)2023年上海高考数学模拟卷02(已下线)信息必刷卷04(北京专用)
3 . 若项数为
且
的有穷数列
满足:
,则称数列
具有“性质
”.
(1)判断下列数列是否具有“性质
”,并说明理由;
①1,2,4,3;②2,4,8,16.
(2)设
,2,
,
,若数列
具有“性质
”,且各项互不相同.求证:“数列
为等差数列”的充要条件是“数列
为常数列”;
(3)已知数列
具有“性质
”.若存在数列
,使得数列
是连续
个正整数1,2,
,
的一个排列,且
,求
的所有可能的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff46f72c6de7f075cf5619178460d51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e2eefa28f5b71a2995ee33bedfe3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9481288ae9dec9eeee678afc3f3a297c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)判断下列数列是否具有“性质
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
①1,2,4,3;②2,4,8,16.
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ba1bba9fe28ec9a32420128c37db2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f99c8716790983ad177fea399d38c7ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad351773d8117faa128041a877bf2db.png)
(3)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c618219d4bfa3ea57a9a8e60ebd91d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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4 . 已知数列
,
满足:存在
,对于任意的
,使得
,则称数列
与
成“k级关联”.记
与
的前n项和分别为
,
.
(1)已知
,判断
与
是否成“4级关联”,并说明理由;
(2)若数列
与
成“2级关联”,其中
,且有
,
,求
的值;
(3)若数列
与
成“k级关联”且有
,求证:
为递增数列当且仅当
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0255ada26e95a41ef6dff56d182db1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dafd98e5b223908b13013c3cacc0386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de49189fbe8c6dff3dd5e434821cb90d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305bb62f5c255d4d3496e3b32a978712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f0143703027c50e08d92dcda0f962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e96fafcc7b7f783d436f853449208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa9cc746124e96ab7c55e2b94700ed0.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb29b58a739bfb2fdd878b09ef3c5435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055066d27bced0e6ffb17162be44cbd4.png)
您最近一年使用:0次
2022-11-06更新
|
348次组卷
|
8卷引用:专题06数列必考题型分类训练-3
(已下线)专题06数列必考题型分类训练-3上海市光明中学2022届高三模拟(一)数学试题上海市七宝中学2022届高三下学期6月月考数学试题(已下线)第06讲 第六章 数列综合测试(测)-2023年高考数学一轮复习讲练测(新教材新高考)(已下线)第10讲 数学归纳法与数列综合应用 - 1(已下线)专题17 数列(练习)-2(已下线)专题17 数列(模拟练)2022届上海市普通高等学校招生全国统一考试数学模拟试题(一)
5 . 设数列
,
的项数相同,对任意不相等的正整数
,
都有
,则称数列
,
成同序(反序).
(1)若
,
,且
,
成反序,求
的取值范围;
(2)记等差数列
的前
项和为
,公差为
,求证:
和
同序的充要条件是
;
(3)若数列
的通项公式为
其前
项的和为
,令
,研究
,
是成同序,反序,还是其它情况?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fae7b6189c12fdd5db1c5db86a771c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78a26e3eeac053424c52ab90f6a3490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210e78933647af01495fb294a5ff4d8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)记等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce224c28ca451c4f105dc3b077736cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c68aa46e0ea528d531c37346e3b42463.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24fb0ce14068cf6b40168eeefcd11ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4867dfd2b1fa71e386275fe0fed234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
您最近一年使用:0次
名校
6 . 记实数
、
中较小者为
,例如
,
,对于无穷数列
,记
.若对任意
均有
,则称数列
为“趋向递增数列”.
(1)已知数列
、
的通项公式分别为
,
,判断数列
、
是否为“趋向递增数列”?并说明理由;
(2)已知首项为
,公比为
的等比数列
是“趋向递增数列”,求公比
的取值范围;
(3)若数列
满足
、
为正实数,且
,求证:数列
为“趋向递增数列”的必要非充分条件是
中没有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6323f3d42a8c329f1231a4183cca21c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d009da28dbbec2e0493e504b153d5e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467d1e5a0787b9a3d892291abc5216a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70642e7d9ccc8591908f12eea59c9daa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf5776ec7059c208daf01ca48a34915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34916ec3b585a5926485d45191591e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbb83894b8870017f24b5649ddc6360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4412c62615c55a6f09fcd4d54b10488.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)已知首项为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d42b37737d111c9e40136a4aa3266f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
您最近一年使用:0次
2022-11-06更新
|
1482次组卷
|
8卷引用:专题06数列必考题型分类训练-3
(已下线)专题06数列必考题型分类训练-3上海市复旦大学附属中学2022-2023学年高二上学期期末数学试题(已下线)核心考点06数列-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)上海市徐汇区2022届高三下学期二模数学试题(已下线)第10讲 数学归纳法与数列综合应用 - 1(已下线)专题1 数学归纳法及其变种 微点3 数学归纳法综合训练(已下线)模块九 数列-2(已下线)专题8 等比数列的单调性 微点1 判断等比数列单调性的方法
名校
解题方法
7 . 对于数列
,我们把
称为数列
的前
项的对称和(规定:
的前1项的对称和等于
),已知等比数列
的前
项和的对称和等于
,
.
(1)求实数
的值;
(2)设数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3aa7d509e59a2daa3dc8c14ca23feb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a634bc692844523c9c3cb01277237d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2fabc947ce81e7182831e235fd6135.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e87e613b6b487247e144cc3810f813.png)
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8 . 已知数列
,
,…,
的各项均为整数,且对任意的
,2,…,
,都有
.将A的所有项之和记为
.
(1)若
,
,求
的最大值;
(2)若
,求证:
;
(3)设
.将所有符合题意且
的数列A的总个数记为M,判断M是否为4的倍数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140b9dbcada4ac2e5fe3cc30009bcd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5453ec6a9e8b96357c888ea863ddcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7334c46af837676ada9575630a48d60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa2648793a3889448088fa3f9f5aa49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249ccefb918d906ca640ec76e53247e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bba7a40102e81f5759f7b05ebf5a18c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc133d5b11b33a904875182d8c8261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2815b24f5a89be7ae53aed93182e8988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bba7a40102e81f5759f7b05ebf5a18c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8a0d4158a6df1bf0631095eb51c10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb189e7f5f358b2de87dc4b93413366.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4d99e36b93b0511914db81ed9c6a34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1dcb0c869ab0f0db7de71c644f7856.png)
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2022-10-24更新
|
637次组卷
|
2卷引用:北京市清华大学附属中学2022-2023学年高二上学期10月统练数学试题(1)
名校
解题方法
9 . 将平面直角坐标系中的一列点
.记为
,设
,其中
为与y轴正方向相同的单位向量若对任意的正整数n,都有
,则称
为T点列.
(1)判断点列
是否为T点列,直接写出结果;
(2)求证
是T点列:
(3)若
为T点列,且
.任取其中连续三点
,证明
为钝角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71fa0a4178c2ab8acf3342d228ed8e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f4f7da7655b76971cdf3e11600a9f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869434cabde100f74953780653d3a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88364f251f3d8a14d9784588f45f7acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e972e658495ad2b603e2b11f3d5e20ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f4f7da7655b76971cdf3e11600a9f3.png)
(1)判断点列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf87e7e5ae1e3d45c2ccd73dd8d29a2.png)
(2)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6ec98836c8c456b45ab94f9aa5a7fb.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f4f7da7655b76971cdf3e11600a9f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ed0fe3ab3607bcc987be7ba9ae5bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade2b9aa97d71e08923f71c8eba032a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d24dc108423b4ca4d3b94e9779089f73.png)
您最近一年使用:0次
10 . 已知数列
的通项公式为
(n,a均为正整数).
(1)若
、
、
成等差数列,求a的值;
(2)是否存在k(
且
)与a,使得
、
、
成等比数列?若存在,求出k的取值集合,若不存在,请说明理由;
(3)求证:数列
中任意一项
总可以表示成数列
中其它两项之积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e087143e3e25536f18717e83ff2779b4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d04a8b7a7595251251b8e0b7e665e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5453ec6a9e8b96357c888ea863ddcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34bc3df3bea2def2fd30b0f90d75ef32.png)
(2)是否存在k(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddb1a84dfadad4094c407bbc6b9f0bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ddffeed8bf169fb7b544fc16f7d3b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d04a8b7a7595251251b8e0b7e665e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c85bd8a6ac6110719b0cb7f1a78b3a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
(3)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
您最近一年使用:0次