1 . 已知递增数列
的前n项和为
,且
,
.
(1)求数列
的通项公式;
(2)设
.
(ⅰ)求数列
的通项公式;
(ⅱ)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e84c2e4a2a86ffc252955c06e9b567e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37b430b94a1afdb43f2a80782627c02.png)
(ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f3d151cbe277608d3a6cfbbe3f5eb9a.png)
您最近一年使用:0次
名校
解题方法
2 . 有n个首项都是1的等差数列,设第m个数列的第k项为
,公差为
,并且
成等差数列.
(1)当
时,求
,
,
以及
;
(2)证明
(
,
,
是m的多项式),并求
的值;
(3)当
,
时,将数列
分组如下:
(每组数的个数构成等差数列),设前
组中所有数之和为
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda60be3ec6a53c2186021809f87d2ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8598379ec01edc16c72c1d3fa3ce81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf101d0cde32b057c21d42a2b336764.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599d18f02ae5e12191a37cd2d886dc93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/498d357985304a737e7a01272ebbcf15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f4b25db4e5f4a3743476ae088720fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597b1b4a90194fdb88a0a9a3022f5038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f2fa5d1e2f6118ea97b390dcfaf293.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2470082d0a6aa317030c6904f438c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615b5e9149cb77ee71a4684bfd43e98a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca4b2f545d6cfd6764ad19c7bc2c2f8.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea6578afabc23f5d7041b88c3790dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf8b33cde65d8456d9a56a19f5c1a377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463195d16c135c5aea8fc05fa74a5273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02dfd2fab2d2a804adcfce8ce36f556f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53e88f967e1e79b7fd23bc4af4ac862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb7b05a076e75ba6ca76e758a590e9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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解题方法
3 . 若数列
满足
,其中
,则称数列
为M数列.
(1)已知数列
为M数列,当
时.
(ⅰ)求证:数列
是等差数列,并写出数列
的通项公式;
(ⅱ)
,求
.
(2)若
是M数列
,且
,证明:存在正整数n.使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a07614926587f57bc5f341c4f97f4d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec574b71bbd7671223f8c833c8c8b61.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/8ec1a744042c32d0a851f98fafaa81f3.png)
(ⅰ)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/362832fa3d3c13c1eafd565349d66dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115da54f93de5e89d1e7f443fccb61f8.png)
(ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0992722f5002aeafa39d25c6b5f4644b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21085fbd6c4b34588f17fc466c845ffe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a789a9be1723bfbd38ae538a9f39dc1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446e8a7985d4d3dd95c70dc4aad67861.png)
您最近一年使用:0次
2024-03-25更新
|
1248次组卷
|
3卷引用:天津和平区2024届高三一模数学试题
4 . 已知等差数列
的前
项和为
,且
.
(1)求数列
的通项公式以及
;
(2)若等比数列
满足
,且
,
(ⅰ)求
;
(ⅱ)若
,
,
是
与
的等比中项且
,则对任意
,求
的最小值.
![](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/cc3627e4bff803df47d958c49bf3e879.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e97e233ed113778b141fb3564f1e83.png)
(2)若等比数列
![](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/04f7c66901f0ebfb4f7c119429683393.png)
(ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2679162df3af05f955d84a1757ebb7b2.png)
(ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de29640ad284c5bdc862184b001add16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6b18b109a656b62fb173680ae99ca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3256ba045010d9bba6659027aea456fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb9b392b1c516e66242727dd9c055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5f562599e0b9c4c57acc1dcf2e201c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd64300c0f6bb13f6849c4e04dfe066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807d332928e3a4fa4727f78cc829de13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
您最近一年使用:0次
5 . 已知数列
为等差数列,数列
为等比数列,且
,
,
,
(
).
(1)求
,
的通项公式;
(2)已知
,求数列
的前
项和
;
(3)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/2a0d29f34218cd60cc6e9ce4dcd13925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5aa46a7512675ab55f82d18ca3cc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d1279460f2d2eca25ef419cd17ec6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f287759fad50450b0bf4f69ee80ecdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f759116865a2bacd2515981e7af2b552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/232c753e94442cf89732ce7e9ac0ee1f.png)
您最近一年使用:0次
2023-11-22更新
|
1033次组卷
|
4卷引用:黄金卷05
(已下线)黄金卷05天津市滨海新区塘沽第一中学2024届高三上学期第二次月考(期中)数学试题天津市河东区第三十二中学2024届高三上学期第二次月考数学试题(已下线)专题09 数列的通项公式、数列求和及综合应用(9大核心考点)(讲义)
2021高二·江苏·专题练习
名校
解题方法
6 . 已知数列
的前n项和为
,且
,
,数列
满足:
,
,
,
.
(1)求数列
,
的通项公式;
(2)求数列
的前n项和
;
(3)若不等式
对任意
恒成立,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c57356fade5a5d8e46c4750ac4bb6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aaee408bdec05bbdfcd4b841a331e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627e48c5ab76f5d1874c57a40d32d89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0de4b991edd19fc9f5d4e4832b0507.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f01e755c2fb2548cdde536d01347d0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
您最近一年使用:0次
2022-01-03更新
|
1322次组卷
|
5卷引用:天津市南仓中学2023-2024学年高二下学期3月教学质量过程性监测与诊断数学试题
天津市南仓中学2023-2024学年高二下学期3月教学质量过程性监测与诊断数学试题天津市滨海新区塘沽第一中学2021-2022学年高二上学期期末自测自评数学试题(已下线)专题06 《数列》中的取值范围问题-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)(已下线)高二数学下学期期末精选50题(压轴版)-2021-2022学年高二数学考试满分全攻略(人教A版2019选修第二册+第三册)江苏省镇江市句容碧桂园学校2022-2023学年高二上学期12月第二次月考数学试题
7 . 设
是等差数列,
是等比数列.已知
.
(Ⅰ)求
和
的通项公式;
(Ⅱ)设数列
满足
其中
.
(i)求数列
的通项公式;
(ii)求
.
![](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/1967aa90e732b3e39c1666f8ff4db7e7.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(Ⅱ)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e8470c2a5aa3708590de468bfd8688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad52924df9291d5d191d18e09374ee1.png)
(i)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75e0fa828f6148dc4839112042e2a66.png)
(ii)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b259c23959844c0f89c6fa2dcfa9b9a.png)
您最近一年使用:0次
2019-06-09更新
|
10565次组卷
|
40卷引用:专题11数列
专题11数列2019年天津市高考数学试卷(理科)2020届天津市南开中学高三数学开学统练试题天津市十二区县重点学校2023届高三下学期联考(一)考前模拟数学试题(已下线)5.3 数列的求和问题(高考真题素材之十年高考)(已下线)专题08 数列——2019年高考真题和模拟题理科数学分项汇编(已下线)第04讲 数列求和(讲)-《2020年高考一轮复习讲练测》(浙江版)专题6.4 数列求和(讲)【文】—《2020年高考一轮复习讲练测》江苏省盐城市盐城中学2019-2020学年高二上学期10月阶段性考试数学试题(已下线)专题6.4 等差、等比数列与数列求和(讲)【理】-《2020年高考一轮复习讲练测》(已下线)专题6.4 数列求和(讲)-江苏版《2020年高考一轮复习讲练测》2020届浙江省杭州市学军中学高三下学期3月月考数学试题(已下线)专题12 数列——三年(2018-2020)高考真题理科数学分项汇编(已下线)专题14 数列综合-五年(2016-2020)高考数学(理)真题分项(已下线)考点20 数列的综合运用-2021年高考数学三年真题与两年模拟考点分类解读(新高考地区专用)(已下线)考点19 数列通项与求和与通项-2021年高考数学三年真题与两年模拟考点分类解读(新高考地区专用)(已下线)专题6.4 数列求和(精讲)-2021届高考数学(文)一轮复习讲练测(已下线)专题7.4 数列求和(讲)-2021年新高考数学一轮复习讲练测(已下线)专题7.4 数列求和(精讲)-2021年新高考数学一轮复习学与练(已下线)专题6.4 数列求和(精讲)-2021年高考数学(文)一轮复习学与练(已下线)专题6.4 数列求和(精讲)-2021年高考数学(理)一轮复习学与练(已下线)专题6.4 数列求和(精讲)-2021届高考数学(理)一轮复习讲练测(已下线)专题09 数列与数学归纳法-2021年浙江省高考数学命题规律大揭秘【学科网名师堂】(已下线)考点40 等差数列及其前n项和-备战2021年新高考数学一轮复习考点一遍过(已下线)考点42 数列求和-备战2021年新高考数学一轮复习考点逐一攻克(已下线)专题4.2 数列-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)预测07 数列-【临门一脚】2020年高考数学三轮冲刺过关(江苏专用)(已下线)专题4.3 等比数列-2020-2021学年高二数学同步课堂帮帮帮(人教A版2019选择性必修第二册)(已下线)数学-2021年高考考前20天终极冲刺攻略(三)(新高考地区专用)【学科网名师堂】 (6月1日)(已下线)专题7.4 数列求和(讲)- 2022年高考数学一轮复习讲练测(新教材新高考)(已下线)第29讲 数列求和(讲)- 2022年高考数学一轮复习讲练测(课标全国版)苏教版(2019) 选修第一册 突围者 第4章 章末培优专练人教B版(2019) 选修第三册 突围者 第五章 高考挑战(已下线)专题09 数列-五年(2017-2021)高考数学真题分项(新高考地区专用)(已下线)第四章 数列(提高卷)-《阳光测评》2020-2021学年高二数学单元提升卷(人教A版2019选择性必修第二册)苏教版(2019) 选修第一册 一蹴而就 第4章 单元整合(已下线)专题14 盘点数列的前n项和问题——备战2022年高考数学二轮复习常考点专题突破人教B版(2019) 选修第三册 一举夺魁 第五章 学科素养提升(已下线)2022年高考考前20天终极冲刺攻略(三)【数学】(新高考地区专用)(5月31日)(已下线)第04讲 数列求和(练)