1 . 已知等比数列
的前
项和为
,
是等差数列,
,
,
,
.
(Ⅰ)求
和
的通项公式;
(Ⅱ)设
的前n项和为
,
,
.
(ⅰ)当n是奇数时,求
的最大值;
(ⅱ)求证:
.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdd3a25ac2cde3d2c884028f750cfff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684b935a7274130d081bfa7b2b938023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c45994e58cc2032df1cc501e44ed17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b3874af2d1f4dcf456e5d24c4359a9.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db76422e0e75880dab2c22b549e1323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(ⅰ)当n是奇数时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b3820b14ec56411661ab328bb2ad17.png)
(ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58924a1e6d16eff497407912c41fa5f.png)
您最近一年使用:0次
2021-05-11更新
|
835次组卷
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4卷引用:天津市和平区2021届高三下学期一模数学试题
天津市和平区2021届高三下学期一模数学试题(已下线)天津市和平区2021届高三下学期第一次质量调查数学试题天津市宝坻区第一中学2020-2021学年高三上学期第四次月考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
名校
解题方法
2 . 已知数列
满足
,数列
满足
.
(1)求数列
、
的通项公式;
(2)令
,求数列
的前n项和
;
(3)
,求对任意的正整数n都有
成立的k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1575862605ff992ef5b8db9e1627243e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4f231f556d4ae2a39cf38c76fc714d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b67af73f586837594ab0db4b89baed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33305ffdb35723c9863523ac48cfc7bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1275b12f777f1e88fbadc45dda6622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2140e0cd8aaffd8436ed5a20bf76f7.png)
您最近一年使用:0次
名校
解题方法
3 . 已知数列
的前
项和为
,满足
,数列
满足
,且
.
(1)证明数列
为等差数列,并求数列
和
的通项公式;
(2)若
,求数列
的前2n项和
;
(3)若
,数列
的前
项和为
,对任意的
,都有
,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/deb64a2d5265b33d6c6727b956c9c29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0ac6e090846e97ccedd2f6d9168bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f997e6d483c0d0990cb550bbde39fa9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b5eef03339913e27e0ce81d6f32b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a17951c56a2ebe66ef13d08135ac0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d4e8502106802f1485c3b0f28f2664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee6e88ac0b5133d7f51c7e166faf77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2021-08-17更新
|
782次组卷
|
10卷引用:天津市滨海新区七所重点学校2018届高三毕业班联考数学文科试题
天津市滨海新区七所重点学校2018届高三毕业班联考数学文科试题天津市南开中学2021届高三下学期三模数学试题天津市市区重点中学2022届高三下学期三模数学试题(已下线)天津市七所重点学校2023届高三下学期3月联考文科数学试题天津市北辰区南仓中学2024届高三上学期教学质量过程性检测与诊断数学试题【全国校级联考】滨海新区七所重点学校2018届高三毕业班联考数学(文)试题江苏省南通市启东中学2019-2020学年高二上学期第二次质检数学试题江苏省南通市启东中学2019-2020学年高二上学期第一次质量检测数学试题江苏省扬州市高邮中学2020-2021学年高二上学期9月月考数学试题四川省成都外国语学校2021-2022学年高二上学期入学考试数学(理)试题
名校
解题方法
4 . 已知数列
满足
.
(1)求
;
(2)若
,数列
的前n项和为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
①求
;
②对于任意的
,均有
恒成立,求m的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cca5ec0f1af152b1993fa3b041f8356.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af81b8983a36debb3c1f6339a6eeef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
②对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b96462c90521bbeb401aef56bdf8347.png)
您最近一年使用:0次
2020-11-14更新
|
609次组卷
|
3卷引用:天津市第二十中学2023-2024学年高三下学期第三次统练数学试卷
名校
5 . 给定数列{cn},如果存在常数p、q使得cn+1=pcn+q对任意n∈N*都成立,则称{cn}为“M类数列”.
(1)若{an}是公差为d的等差数列,判断{an}是否为“M类数列”,并说明理由;
(2)若{an}是“M类数列”且满足:a1=2,an+an+1=3•2n.
①求a2、a3的值及{an}的通项公式;
②设数列{bn}满足:对任意的正整数n,都有a1bn+a2bn﹣1+a3bn﹣2+…+anb1=3•2n+1﹣4n﹣6,且集合M={n|
≥λ,n∈N*}中有且仅有3个元素,试求实数λ的取值范围.
(1)若{an}是公差为d的等差数列,判断{an}是否为“M类数列”,并说明理由;
(2)若{an}是“M类数列”且满足:a1=2,an+an+1=3•2n.
①求a2、a3的值及{an}的通项公式;
②设数列{bn}满足:对任意的正整数n,都有a1bn+a2bn﹣1+a3bn﹣2+…+anb1=3•2n+1﹣4n﹣6,且集合M={n|
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae86a14fff543362b6214beb7565ef3.png)
您最近一年使用:0次
2019-06-12更新
|
415次组卷
|
3卷引用:天津市第一中学2021-2022学年高三上学期12月月考数学试题
名校
6 . 已知单调等比数列
中,首项为
,其前n项和是
,且
成等差数列,数列
满足条件![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85cc604ef36b3e20d83dbfc3e34ff7d.png)
(Ⅰ) 求数列
、
的通项公式;
(Ⅱ) 设
,记数列
的前
项和
.
①求
;②求正整数
,使得对任意
,均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ad47a61bdde0df772afa6c26d7da9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85cc604ef36b3e20d83dbfc3e34ff7d.png)
(Ⅰ) 求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
(Ⅱ) 设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a17a2edce04f09e7de7b94394a1f3bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cca3ebd10a38201939a3694cc95186a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8c29b297e3ec337c3139c2a1ebed1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9df446a0b85dc62f436cb3d7a317760.png)
您最近一年使用:0次
2019-05-12更新
|
1172次组卷
|
7卷引用:【区级联考】天津市和平区2019届高三第二学期第二次质量调查数学(理)试题
【区级联考】天津市和平区2019届高三第二学期第二次质量调查数学(理)试题【区级联考】天津市和平区2019届高三下学期二模理科数学试题天津市滨海新区大港第一中学2021--2022学年高三上学期入学测试数学试题(已下线)专题6.3 等比数列及其前n项和(练)【理】-《2020年高考一轮复习讲练测》2020届河北省衡水中学高三年级上学期五调考试数学(理科)试题(已下线)专题19 数列求和-冲刺2020高考跳出题海之高三数学模拟试题精中选萃四川省乐山市2020-2021学年高一下学期期末数学试题
名校
7 . 设数列
,
,已知
,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e0f0ffc25330e01b98c6195ca70f2d.png)
求数列
的通项公式;
求证:对任意
,
为定值;
设
为数列
的前n项和,若对任意
,都有
,求实数p的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89522f8accbac821246a616a49340d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10d6b48305c2146d8fe7e743c5162b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7e0e4bfd3a4dbd73eaa1082fbea607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07d31688c1844f6d9f3521348ee7986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e0f0ffc25330e01b98c6195ca70f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d74289bfc301ce76598995ade754060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8c29b297e3ec337c3139c2a1ebed1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d3f7c80c20b28333f9da487e2aa02ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8c29b297e3ec337c3139c2a1ebed1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3d5709525ac552c0e1f1115e6941e0.png)
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10-11高三·广西·阶段练习
解题方法
8 . 数列
的首项
,前
项和
与
之间满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5eb3e4fb29dfbb133fab163f56b98e0.png)
(I)求证:数列
为等差数列;
(II)设存在正数
,使
对一切
都成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.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/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5eb3e4fb29dfbb133fab163f56b98e0.png)
(I)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051e50e9a3fb2a8c63e171eaed229b2d.png)
(II)设存在正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40d977ed81fd0ecbc7f252deb914b95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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