名校
解题方法
1 . 设
,正项数列
满足
,下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db87ffceab6741bf496f69449cc728d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739a8666b7e9698c1266839dde5ae428.png)
A. ![]() ![]() |
B.![]() ![]() |
C.存在![]() ![]() |
D.存在![]() ![]() |
您最近一年使用:0次
2022-07-25更新
|
1141次组卷
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4卷引用:江苏省盐城中学2022届高三下学期5月仿真模拟数学试题
2 . 已知两个等差数列
和
,其公差分别为
和
,其前
项和分别为
和
,则下列说法正确的是( )
![](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/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.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)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() ![]() |
您最近一年使用:0次
2022-05-31更新
|
1222次组卷
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4卷引用:江苏省南京市江宁高级中学2022届高三下学期适应性考试数学试题
3 . 已知正项等比数列{an}的前n项和为Sn(n∈N*),且a3=a2+2,a2•a4=16.数列{bn}的前n项和为Tn,且
,
.
(1)求数列{an}的通项公式及其前n项和Sn;
(2)证明数列{bn}为等差数列,并求出{bn}的通项公式;
(3)设数列
,问是否存在正整数m,n,l(m<n<l),使得cm,cn,cl成等差数列,若存在,求出所有满足要求的m,n,l;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8acac935181771fc709ebfa793e726dc.png)
(1)求数列{an}的通项公式及其前n项和Sn;
(2)证明数列{bn}为等差数列,并求出{bn}的通项公式;
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1559d07f9c9aa7bc3f5c335d8d2b8804.png)
您最近一年使用:0次
2020-09-22更新
|
757次组卷
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5卷引用:【市级联考】江苏省南通市2019届高三阶段性学情联合调研数学试题
【市级联考】江苏省南通市2019届高三阶段性学情联合调研数学试题(已下线)期中测试卷(基础卷)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)(已下线)专题3.5+不等式(基础卷)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)(已下线)第四章++数列2(能力提升)-2020-2021学年高二数学单元测试定心卷(人教A版2019选择性必修第二册)(已下线)本册内容测试(能力提升)-2020-2021学年高二数学单元测试定心卷(人教A版2019选择性必修第二册)
4 . 已知数列
的前
项和为
,
(
为常数)对于任意的
恒成立.
(1)若
,求
的值;
(2)证明:数列
是等差数列;
(3)若
,关于
的不等式
有且仅有两个不同的整数解,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c6e0c2d16cda7e8b2b8c588adeb8ae.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/7c5911e92fa55bd085fb8004d8943130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336b78c10d5c3e954c2436e5da84e33f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-05-16更新
|
858次组卷
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4卷引用:2020届江苏省南京师大附中、淮阴中学、姜堰中学、海门中学四校高三下学期4月联考数学试题
2020届江苏省南京师大附中、淮阴中学、姜堰中学、海门中学四校高三下学期4月联考数学试题江苏省2020届高三下学期6月高考押题数学试题(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02 等差数列及前n项和(专题测试)-2020-2021学年高二数学重难点手册(数列篇,人教A版2019选择性必修第二册)
解题方法
5 . 若数列
,
满足
,则称数列
是数列
的“偏差数列”.
(1)若常数列
是数列
的“偏差数列”,试判断数列
是否一定为等差数列,并说明理由;
(2)若无穷数列
是各项均为正整数的等比数列,且
,数列
为数列
的“偏差数列”,数列
为递减数列,求数列
的通项公式;
(3)设
,数列
为数列
的“偏差数列”,
、
且
,若
,(
)对任意的
恒成立,求
的最小值.
![](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/6f1ba05858ddb902eda106c0361b2e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若常数列
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若无穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ea11bd18577ee314988bc70b0caf23f.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/3b3b8eff9000900bf5b26afd3489cb3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4523dca11f510fac3a51d406fd78448.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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4a2ab6d0957e52a1242e6d899be539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d1512b9a0d9d79f8b71ced14eacd85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658f7e866c7ae90f7c0d1444000d7a4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa72c594ebe33496fa7b9edf1db5c7e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5dd1562138ab60802c33a17a8d7867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5db3536b4f6b80285e2044bec5ab20bd.png)
您最近一年使用:0次
6 . 已知数列
的前
项和记为
,且
,数列
是公比为
的等比数列,它的前
项和记为
.若
,且存在不小于3的正整数
,
,使得
.
(1)若
,
,求
的值;
(2)求证:数列
是等差数列;
(3)若
,是否存在整数
,
,使得
,若存在,求出
,
的值;若不存在,请说明理由.
![](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/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd26dfa6867484c7617242643e574222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2a4cb5c7215134ba4633b998243542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f3406f31dd258f29ee3a8d290485194.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a0eecb5b800fce9ae10aed86ffee62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
(2)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d9b6c86435e0ceff94d8ad1cd03737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c6eed9f683ae8df6f50f79f21fc7ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2019-06-12更新
|
820次组卷
|
7卷引用:【市级联考】江苏省苏州市2019届高三高考模拟最后一卷数学试题
解题方法
7 . 在数列
中,
,且对任意
,
成等差数列,其公差为
.
(1)若
,求
的值;
(2)若
,证明
成等比数列(
);
(3)若对任意
,
成等比数列,其公比为
,设
,证明数列
是等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b6d151d3f864bae873987f6db9327a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947ea64ca7e736854a20389a8ee5b26d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8904e7018ec79c8b0efdcb3ba67cb7cb.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab9a15f8bde29fa4a987a2d0a6e4064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe61d313eeca8ba47478a9de40540db8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597f7f45c16b0f1f35acbb4528863311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec5cf9144f3018f2099ebbde3322f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b6d151d3f864bae873987f6db9327a.png)
(3)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b6d151d3f864bae873987f6db9327a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec5cf9144f3018f2099ebbde3322f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9778f679a2495d92a52b36e5e86d4b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1e7059a9d5555935ffded7be5f8c9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1490fc8c90d79ab85d83f98667e177.png)
您最近一年使用:0次
2019-06-11更新
|
833次组卷
|
3卷引用:【市级联考】江苏省徐州市2018-2019学年高三考前模拟检测数学试题
【市级联考】江苏省徐州市2018-2019学年高三考前模拟检测数学试题【市级联考】江苏省徐州市2019届高三考前模拟检测数学试题(已下线)专题6.6 数列(单元测试)(测)【理】-《2020年高考一轮复习讲练测》
8 . 设无穷数列
的前
项和为
,已知
,
.
(1)求
的值;
(2)求数列
的通项公式;
(3)是否存在数列
的一个无穷子数列
,使
对一切
均成立?若存在,请写出数列
的所有通项公式;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381576e698a46df8c497e6b5f8346ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b0afb0e10dd9ec1816b1fbd856376de.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb5ca241bb7c313ef0366d3ddba93bc.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
(3)是否存在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/031eb925df23d31e39aa653e3f683e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c6a5ef0658de3093da8d37ae86cf0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d66a432435516d2f2a04f4cbf4b9090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6e9f2a9ab9f3612590a52a8e2a2a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c6a5ef0658de3093da8d37ae86cf0e.png)
您最近一年使用:0次
名校
解题方法
9 . 若数列同时满足:①对于任意的正整数
,
恒成立;②若对于给定的正整数
,
对于任意的正整数
恒成立,则称数列
是“
数列”.
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9a8ce4e92e0069ce0bd57396772f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af90aba749c812fd56ffa2dd4e414dc.png)
(2)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d129dfd51ca2d74bb02d01ae46ab168d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252f7e961c3b716ebcb4cc4bdb94b1cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b5891a2e6d7b1bf25a78a3c5c55cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f6e3d89bd75f8ff2068d4bbcf26fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8541cfcfab41a5a4b7d40bd6c6fe3048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85464ad89ff6d081e57a97e057c1b92e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
2018-02-23更新
|
1046次组卷
|
7卷引用:江苏省南通市2018届高三上学期第一次调研测试数学试题
江苏省南通市2018届高三上学期第一次调研测试数学试题江苏省南通市、泰州市2018届高三年级第一次调研测试数学(理)试题(已下线)《2018届优等生百日闯关系列》【江苏版】专题二 第六关 以新定义数列为背景的解答题【全国百强校】江苏省南京金陵中学2019届高三第一学期期中考试数学试题【全国百强校】江西省高安中学2019届高三上学期第四次月考(期中)考试数学(理)试题(已下线)专题16 数列新定义题的解法 微点1 数列新定义题的解法(一)(已下线)专题17 数列探索型、存在型问题的解法 微点1 数列探索型问题的解法
2013·上海浦东新·三模
名校
10 . 已知数列
,
满足:
.
(1)若
,求数列
的通项公式;
(2)若
,且
.
① 记
,求证:数列
为等差数列;
② 若数列
中任意一项的值均未在该数列中重复出现无数次,求首项
应满足的条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89d1f32c1605cfdb8e8855051b9f6ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3249883fe3dab15d47302fef4f37146b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3473964e962ac6304ee4a66a239f9e78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93d57876a4346a2c065c1c2c69e6510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e19845d07c89edf3424ef3caf45810.png)
① 记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a79cf657c6b6d301bfd1e748bff12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
② 若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245588805f41199996befd1d3d5c7c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
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