解题方法
1 . 在平面直角坐标系上,设不等式组
所表示的平面区域为
.记
内的整点(即横坐标和纵坐标均为整数的点)的个数为
.
(1)求
,
,
,并猜想
的表达式再用数学归纳法加以证明;
(2)设数列
的前
项和为
,数列
的前
项和为
,是否存在自然数
,使得对一切
,
恒成立.若存在,求出
的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c8440e20124eb80265137d1014aad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d4e8502106802f1485c3b0f28f2664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d4e8502106802f1485c3b0f28f2664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f13edce96379387415b4c8e996a92abe.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设数列
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33591caf3f8bec653e47cd9b644ae9c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2022高三·全国·专题练习
名校
解题方法
2 . 设n是正整数,r为正有理数.
(1)求函数
的最小值;
(2)证明:
;
(3)设
,记
为不小于x的最小整数,例如
,
,
.令
,求
的值.
(参考数据:
,
,
,
.)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0d7b3f0c1dc6ae73caa79af157a11d.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f7e9e252a70a7684b6ffc848fce493.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898a6c355155c992f5e44bb86684225a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2920f45281a12f86b030a132bcc2416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4e08a700019de14d9662815173fa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07a4445715259619217dffa47f431a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa334c2d71c4e4a5a707fff30dbf20d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa2b51518d8a07f8aee74b0d83a59ff.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3099ecf9f1f6dd97203f319369af2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1793985234bb6517f82deeff92f495af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a19c0e54ac65527b11a31a2de0a64e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843ad0ae750ff474168613f0eac00983.png)
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2023-05-23更新
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643次组卷
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5卷引用:第5章 一元函数的导数及其应用(新文化与压轴30题专练)-2021-2022学年高二数学下学期考试满分全攻略(人教A版2019选修第二册+第三册)
(已下线)第5章 一元函数的导数及其应用(新文化与压轴30题专练)-2021-2022学年高二数学下学期考试满分全攻略(人教A版2019选修第二册+第三册)(已下线)第34讲 估值问题-突破2022年新高考数学导数压轴解答题精选精练(已下线)第二篇 函数与导数专题4 不等式 微点2 伯努利不等式(已下线)第三篇 数列、排列与组合 专题2 多边形数、伯努利数、斐波那契数、洛卡斯数、明安图数与卡塔兰数 微点3 伯努利数天津市南开中学2024届高三上学期第三次月考数学试题
3 . 已知数列
中,
,当
时,
,记
.
(1)求数列
的通项公式;
(2)设数列
的前n项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cefeddf71dca8ae824328df3f0e5e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc06122d220dccaffc64bf0eaeddc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5653b60d16ec4e653518f0562680250.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30136113176ba7fe660e998d0873157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e7d6bcb2f499cf28d5d79cf6d925f39.png)
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2022-12-02更新
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1286次组卷
|
6卷引用:4.2 等差数列(练习)-高二数学同步精品课堂(苏教版2019选择性必修第一册)
(已下线)4.2 等差数列(练习)-高二数学同步精品课堂(苏教版2019选择性必修第一册)湖南省郴州市安仁县第一中学2021-2022学年高二数学模拟试题(已下线)山东省青岛第二中学2022-2023学年高三上学期1月期末测试数学试题变式题17-22(已下线)专题06 数列求和-2022-2023学年高二数学新教材同步配套教学讲义(苏教版2019选择性必修第一册)(已下线)专题训练:数列综合运用大题-【题型分类归纳】2022-2023学年高二数学同步讲与练(人教A版2019选择性必修第二册)(已下线)拓展三:数列与不等式 -【帮课堂】2022-2023学年高二数学同步精品讲义(人教A版2019选择性必修第二册)
4 . 已知数列
满足
,
,令
,设数列
前n项和为
.
(1)求证:数列
为等差数列;
(2)若存在
,使不等式
成立,求实数
的取值范围;
(3)设正项数列
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8363902560fce392e05042b7287929a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bacbbf38ec1b411cfd9693874bebd4a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5fc0b571e6545e133d36af338733b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb3185977be193745f403547d1e9800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8261beeefacd521644faf4658227a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(3)设正项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d1dbbe083e1e1672b2439ea746d976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf47abf4f5649d379a8a69983a3fc56.png)
您最近一年使用:0次
2022-07-21更新
|
1594次组卷
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7卷引用:4.1 等差数列(第2课时)(十三大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
(已下线)4.1 等差数列(第2课时)(十三大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)四川省眉山市2021-2022学年高一下学期期末数学(理)试题广东省广东实验中学2023届高三上学期第一次段考数学试题(已下线)4.2.3 等差数列的前n项和-2022-2023学年高二数学《基础·重点·难点 》全面题型高分突破(苏教版2019选择性必修第一册)(已下线)4.2.2.2 等差数列的前n项和的性质及应用(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)(已下线)专题15 数列不等式的证明 微点6 数列不等式的证明综合训练(已下线)数列与不等式
名校
解题方法
5 . 已知数列
的前
项和为
,且满足
,当
时,
.
(1)计算:
,
;
(2)证明
为等差数列,并求数列
的通项公式;
(3)设
,求数列
的前
项和
.
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317e67653c0733cd4e7b7dd6cec3b8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7ae2cdce39d8ecb11fda2306edf688.png)
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2617bb1f8a9a091ce2c35872295e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70450eccc9c798f35682ec650450fc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ac0dc2cf85bd5a6e6061e17ec8c7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2022-08-14更新
|
1574次组卷
|
7卷引用:4.1 等差数列(第2课时)(十三大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
(已下线)4.1 等差数列(第2课时)(十三大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)四川省广安市武胜烈面中学校2021-2022学年高二上学期数学(理)入学考试试题(已下线)第04讲 数列求和(练)湖北省武汉市江岸区2022-2023学年高二上学期期末数学试题湖北省武汉市华中科技大学附属中学2022-2023学年高二下学期2月月考数学试题(已下线)4.2.3 等差数列的前n项和-2022-2023学年高二数学《基础·重点·难点 》全面题型高分突破(苏教版2019选择性必修第一册)(已下线)4.2.2.1 等差数列的前n项和公式(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)
名校
6 . 已知函数
,其中
且
.
(1)讨论
的单调性;
(2)当
时,证明:
;
(3)求证:对任意的
且
,都有:
…
.(其中
为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d9471f77a4cd41501471bd85c48d34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1413a67adedc88a492a3f2e21e426961.png)
(3)求证:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52daa0cdc945df33fd98a43b930b71f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f663883e5e739184a7fc18c72a7b62ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25da8298b6a96d627f3e8c990e55f0c.png)
您最近一年使用:0次
2022-04-03更新
|
2124次组卷
|
11卷引用:苏教版(2019) 选修第一册 选填专练 第5章 微专题十五 函数、导数与不等式的综合应用
苏教版(2019) 选修第一册 选填专练 第5章 微专题十五 函数、导数与不等式的综合应用重庆市西南大学附属中学2019-2020学年高二下学期阶段性测试数学试题重庆市实验中学2021-2022学年高二下学期第一次月考数学试题辽宁省沈阳市东北育才学校2021-2022学年高二下学期4月月考数学试题四川省泸州市泸县第一中学2021-2022学年高二下学期期中数学理科试题(已下线)第二篇 函数与导数专题4 不等式 微点9 泰勒展开式湖北省郧阳中学、恩施高中、随州二中、襄阳三中、沙市中学2022-2023学年高二下学期四月联考数学试题湖北省部分重点高中2022-2023学年高二下学期4月联考数学试题(已下线)第三章 重点专攻二 不等式的证明问题(讲)江苏省南通市通州区金沙中学2022-2023学年高二下学期5月学业水平质量调研数学试题(已下线)专题11 利用泰勒展开式证明不等式【讲】
7 . 已知各项均为正数的等比数列
的前
项和为
,且
,
.
(1)若等差数列
满足
,求
,
的通项公式;
(2)若
___________,求数列
的前
项和
.
在①
;②
;③
这三个条件中任选一个补充到第(2)问中,并对其求解.
注:如果选择多个条件分别求解,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/68fdda42235ad9525689afc070c3a866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0e5bfdd1607451f12cdde88c6353e6.png)
(1)若等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/803e5abeef392772196475fa2438753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ddb9f59ac6af99a8e1db5c320b47fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
在①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06202c3e663f5da1fff76b76fd1d6d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0da92566c9d7eaaa9f6e84ca723a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c606f39cb99766e5065c31a6f677096a.png)
注:如果选择多个条件分别求解,按第一个解答计分.
您最近一年使用:0次
2021-03-02更新
|
1602次组卷
|
5卷引用:人教A版(2019) 选修第二册 突围者 第四章 专项拓展训练2 数列的前n项和的求解
人教A版(2019) 选修第二册 突围者 第四章 专项拓展训练2 数列的前n项和的求解2023版 湘教版(2019) 选修第一册 过关斩将 第1章 综合拔高练福建省漳州市2021届高三毕业班下学期第一次教学质量检测数学试题(已下线)专题1.4 数列-结构不良型-2021年高考数学解答题挑战满分专项训练(新高考地区专用)(已下线)第2讲 数列通项与求和(讲·)-2022年高考数学二轮复习讲练测(新教材地区专用)
解题方法
8 . 已知等比数列
的前
项和为
,
,
.数列
的前
项和为
,且
,
.
(1)分别求数列
和
的通项公式;
(2)若
,
为数列
的前
项和,是否存在不同的正整数
,
,
(其中
,
,
成等差数列),使得
,
,
成等比数列?若存在,求出所有满足条件的
,
,
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07404ab51f404f9411f79bd4f1fde654.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/2955370028ae5a872079c12bfedc3b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f4aaea63f5ed002251eab217a9a86f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b8d543c7d503fc1073503fc1d52faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385275d29d8c8a7841eaeaa3dfab2cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab01dd4084e2d233f3a8a1de277f1748.png)
(1)分别求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07404ab51f404f9411f79bd4f1fde654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b8d543c7d503fc1073503fc1d52faa.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bd58bdf57dcd9496d5d273ac764123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3363b34c30552a3dc76b2f66fe5288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c10d8295cb4e4fe9284f59d86442d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9d20e9994857aefb65077b666a6a01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69501a69461df9471c11e93450d14164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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2021-01-31更新
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5卷引用:2023版 湘教版(2019) 选修第一册 过关斩将 第1章 综合拔高练
2023版 湘教版(2019) 选修第一册 过关斩将 第1章 综合拔高练山东省烟台市2020-2021学年高二上学期期末数学试题(已下线)专题09 《数列》中的存在性问题-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)江西省新余市2021-2022学年高二上学期期末数学(理)试题(已下线)广东省2022届高三一模数学试题变式题17-22
9 . 已知
,点
在函数
的图象上,
.
(1)证明:数列
是等比数列;
(2)求
及数列
的通项公式;
(3)记
,求数列
的前
项和
,并证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44042d110ad8bf676c2785c2b1f9a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becd598a11b876d858728161a7a09705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c876135b6cce354d27d3e36f1fc017d4.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136eaf36d164bf5ac378a4401c25263b.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad75f8318b09f86fdd2af419e86ee291.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/6b5417778d289001d3eaf94679e03edd.png)
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2021-09-21更新
|
1450次组卷
|
6卷引用:人教A版(2019) 选修第二册 突围者 第四章 专项拓展训练2 数列的前n项和的求解
19-20高一·浙江·期末
解题方法
10 . 已知数列
的前
项和为
,且
,
,数列
满足
,
.
(1)求数列
、
的通项公式;
(2)若数列
满足
且
对任意
恒成立,求实数
的取值范围.
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/507d36a2c78c9bd0bb8ac860532825ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb27cc29c836ab7b82ad4a3acde8a3f5.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731f88a91200a7e34af703b165fdb6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dff70b911b566eee712f93b4570832a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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