1 . 设各项均为正数的数列
的前n项和为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)若
,求数列
的通项公式;
(2)若
(
,
,
为常数),且
,求数列
的通项公式;
(3)若
(
,
,
、
为常数),且
,求数列
的通项公式;
(4)若
(
,
,
、
、c为常数),且
,求证
为等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabb9770b90e11287af9278532cdc897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e12a193c038118dc0dab0c250117b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f56a22d95eab351e09da1afb8153bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45fa60ee6a6ba02f8b2a5d14ee752dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eac5c466be1ff2be0b4b369d9ac5c90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a900d0b93f73490e7efc2e444bb016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45fa60ee6a6ba02f8b2a5d14ee752dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f10eec72002b1e532ca856dfb82480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a970a633535593b590976b4c06c46ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45fa60ee6a6ba02f8b2a5d14ee752dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2 . 设
、
是无穷复数数列,满足对任意正整数n,关于x的方程
的两个复根恰为
、
(当两根相等时
).若数列
恒为常数,证明:
(1)
;
(2)数列
恒为常数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80289c798034033f2f7cfcd7590f2344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3002f56900c2924bfd79fc3865b0a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52cabfa2464501decf05aed007cbaf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841f4ea50fa0c2b4c6e47dc04597abba.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561d594ed04e6652c75dac56259f4292.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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3 . 在一张无限大的方格表上的每个方格中填有一个实数.已知任意一个由格线构成的正方形中的数之和的绝对值不超过1.证明:任意一个由格线构成的矩形中的数之和的绝对值不超过4.
您最近一年使用:0次
名校
4 . 记实数
、
中的较大者为
,例如
,
.对于无穷数列
,记
(
),若对于任意的
,均有
,则称数列
为“趋势递减数列”.
(1)根据下列所给的通项公式,分别判断数列
是否为“趋势递减数列”,并说明理由.
①
,②
;
(2)设首项为
的等差数列
的前
项和为
、公差为
,且数列
为“趋势递减数列”,求
的取值范围;
(3)若数列
满足
、
均为正实数,且
,求证:
为“趋势递减数列”的充要条件为
的项中没有
.
![](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/53ad6b511253288bb1a39cf30a82e644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb626a543683ed841d9bfbe27d8aaea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4efa2bfeae46035438472aa935d3b423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac663b57dc8fbaacb1602e72c16cf023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf5776ec7059c208daf01ca48a34915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf5776ec7059c208daf01ca48a34915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9061f8214290bca8739be868526443d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(1)根据下列所给的通项公式,分别判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d21525bafaecd7d5462f080ec663804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc150cfe321e5601480c07674cb7f811.png)
(2)设首项为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](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/cce224c28ca451c4f105dc3b077736cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d813f3ca8db41a4db6c18eac30fef98.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/4aa3facc7f0df3b9360f71c6685a9a1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d813f3ca8db41a4db6c18eac30fef98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d813f3ca8db41a4db6c18eac30fef98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
您最近一年使用:0次
2021-05-05更新
|
866次组卷
|
4卷引用:上海市普陀区2021届高三二模数学试题
上海市普陀区2021届高三二模数学试题(已下线)专题10 数列(难点)-2020-2021学年高二数学下学期期末专项复习(北师大版2019选择性必修第一册、第二册)(已下线)考向17 数列新定义-备战2022年高考数学一轮复习考点微专题(上海专用)上海市青浦高级中学2022届高三下学期3月月考数学试题
5 . 已知数列![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
,记
,首项
,若对任意整数
,有
,且
是k的正整数倍.
(1)若
,写出数列
的前10项;
(2)证明:对任意
,数列
的第n项
由
唯一确定;
(3)证明:对任意正整数
,数列
从某一项起为等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171660c1b84c77783215548f5c7b18fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2efba990f1fca3fe00fb5e0a7fff0bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6e49730c7fa574cdc4dd468f0112db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd47dbecf560f7b181bcad0acff6aea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0439c0add9e874983695e40b9fc607d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0a9523f2084cf17b8656c11ab1d95e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b3397364f378662f9ca49c50bd59bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc5735838e43b7a229e8f45c9bfffb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(3)证明:对任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7e9f86738335a22298559db41037a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
您最近一年使用:0次
2021-04-14更新
|
849次组卷
|
5卷引用:北京市顺义区2021届高三二模数学试题
北京市顺义区2021届高三二模数学试题上海市七宝中学2021届高三下学期第一次模拟数学试题上海市闵行区七宝中学2021届高三5月份数学模拟试题((已下线)押第17题 解三角形与数列-备战2021年高考数学(理)临考题号押题(全国卷2)专题07数列
6 . 已知数列
,具有性质P:对任意
(
)
与
,两数中至少有一个是该数列中的一项,
为数列
的前
项和.
(1)分别判断数列0,1,3,5与数列0,2,4,6是否具有性质P:
(2)证明:
且
;
(3)证明:当
时,
成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338ab0618ddda6e7eeba8a14c2655833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb18c6dbf63138dd5cf7cae946c106e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ae331839bce8f3c14d7efd7f9d8915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3541598c0e0e6d5050c5a562515c430e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13ee542834ccbb57fcc55b1680ca9db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)分别判断数列0,1,3,5与数列0,2,4,6是否具有性质P:
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1fe4c51169a32e05e4be4acb3d1f21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc31cec2f263c4fbed39962f960daef.png)
(3)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45cf86650443d1b86c79b1e3edc7e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd49c085be2656091b79da53f010a1a.png)
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2021-03-25更新
|
942次组卷
|
3卷引用:北京平谷区2021届高三数学一模试题
7 . 对于由m个正整数构成的有限集
,记
,特别规定
,若集合M满足:对任意的正整数
,都存在集合M的两个子集A、B,使得
成立,则称集合M为“满集”,
(1)分别判断集合
与
是否为“满集”,请说明理由;
(2)若
由小到大能排列成公差为d(
)的等差数列,求证:集合M为“满集”的必要条件是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14f5fdf0e4f9de36f08402dd96d237e.png)
或2;
(3)若
由小到大能排列成首项为1,公比为2的等比数列,求证:集合M是“满集”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e495e34870eb6eef8486f88e567c7e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b9cd59e58555bfc92257ba31d16794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44aed8cc107aecae26873891bfdc5f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf084cdb896062c63e919adf38352d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c01a90899f08d43e7f1b945b96aae753.png)
(1)分别判断集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4804e8c356d6aa5b0d645fed77fec88f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee5d150c4bf3836b14db9cd1017aeacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20655342f9ace8b50a50f5eae6f37beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e789387bf82c893b83cb8f2007f060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14f5fdf0e4f9de36f08402dd96d237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f0913464ddee73888f859ec6ad1696.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20655342f9ace8b50a50f5eae6f37beb.png)
您最近一年使用:0次
2020-12-27更新
|
822次组卷
|
4卷引用:上海市松江区2021届高三上学期期末(一模)数学试题
上海市松江区2021届高三上学期期末(一模)数学试题上海市松江区2021届高三高考数学一模试题北京市人大附中朝阳学校2020-2021学年高二下学期数学统测试题(已下线)考点47 推理与证明-备战2022年高考数学(文)一轮复习考点帮
解题方法
8 . 已知函数
.
(1)证明:
时,
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9a6a0ad0a5ee53205ac42a6261fa03.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b9a926eb1876d017ce1198e32efec6.png)
您最近一年使用:0次
2020-12-14更新
|
1688次组卷
|
7卷引用:专题15 函数、数列、三角函数中大小比较问题(讲)-2021年高三数学二轮复习讲练测 (新高考版)
(已下线)专题15 函数、数列、三角函数中大小比较问题(讲)-2021年高三数学二轮复习讲练测 (新高考版)安徽省池州市东至县2020-2021学年高三上学期12月大联考数学(文)试题(已下线)专题04 利用导数证明不等式 第一篇 热点、难点突破篇(讲)- 2021年高考二轮复习讲练测(浙江专用)(已下线)专题04 利用导数证明不等式(讲)--第一篇 热点、难点突破篇-《2022年高考数学二轮复习讲练测(新高考·全国卷)》(已下线)第三章 重点专攻二 不等式的证明问题(讲)安徽省全省名校实验班2020-2021学年高三上学期大联考文科数学试题江苏省苏州市张家港市2022-2023学年高三上学期1月期末数学试题
9 . 已知数列
,
,
,若数列
、
都是等比数列,公比分别是
、
,设
是数列
的前
项和,数列
是
的零点按从小到大的顺序排成的数列.
(1)求数列
的通项公式,并证明:
;
(2)证明:
,有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f4e1236d7dc0366d9523d0cbb426be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc0d9ecf4a552405584ef092db53508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40dc43b8d11d5462e4b525dd7b03bcfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e79faea88f4bf336ea6cae4b14e5f6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6268630d5e5288048d32f4aa5c8bc02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4e2aba0ca1d981cb845d5f58257a7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53aaf8438a97b289940956774fd7701.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e31dda3a56eb4c92347b3ea80143fc6.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/293f50856f92a18be3301a658781a8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc9e71aae5fbed265ba31ab9b5cfc78.png)
您最近一年使用:0次
10 . 已知数列
和
的前
项和分别为
和
,且
,
,
,其中
为常数.
(1)若
,
.
①求数列
的通项公式;
②求数列
的通项公式.
(2)若
,
.求证:
.
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ea014220aa658c8baa6e1f43e686a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ada913267398cc292bb7b69dae4cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec6fb9e0625b85be3103d317fbb0cca.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfec4233214c3a729c843dee0d186db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2753dc1c83d54044b89e628a7eb247f8.png)
①求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5344eadd4711db34e3f935aedd5fb270.png)
②求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec12a9a60f82467bf7bf834a9a9b1f7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b03536dc607a70a2cc597e739cb345f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f56a22d95eab351e09da1afb8153bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca788f0dfc8b34681bf6ef19b98ab1.png)
您最近一年使用:0次