1 . 在等差数列
中,
,前8项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a932ab4a1202d4ad74cdcbb475025154.png)
(1)求数列
的通项公式;
(2)若数列
是首项为1,公比为2的等比数列,求
的前n项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230cc006a81d018eb0bbb3ed55a07147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a932ab4a1202d4ad74cdcbb475025154.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b4cb856d6ac524c4c1c421e25d668ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195431ccf2756a0db26f14b7b91a32a7.png)
您最近一年使用:0次
2022-10-21更新
|
538次组卷
|
3卷引用:北京市首都师范大学附属密云中学2023届高三上学期阶段性练习数学试题
2 . 给定有穷数列
、
、
、
,定义数列
的绝对差分数列
、
、
、
,其中
.若数列
是单调不减的,即
,则称数列
是
数列.
(1)直接写出下面两个数列的绝对差分数列,并判断其是否为
数列:
①
、
、
、
;
②
、
、
、
;
(2)已知各项均为整数的
数列
、
、
、
满足
,并且其差分数列是等差数列,若
,
,求
的所有可能值;
(3)已知
数列
、
、
、
是
、
、
、
、
的一个排列,若其差分数列
、
、
、
满足
,求
的所有可能值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63f1709c28f68d64d9ea1134d68ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5453ec6a9e8b96357c888ea863ddcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd827a079b9c5f4816d6f025bee8cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa9048c747a4a07468a44167e78c9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5894ed1f1641a511005398971c26496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca61822f7dd849a5ec4708a87aea8d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19354ba989f4d21ccdafc4b4a4d7eea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c6b1d7902e080f145a094c28856457.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c4b9c60fdb001f63be75985dce0615.png)
(1)直接写出下面两个数列的绝对差分数列,并判断其是否为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c4b9c60fdb001f63be75985dce0615.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2cf5a78fa929cd4c9fa72191f97dd23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9880952857950577055578875ab29141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87d696d9bf311bddb74b915fb3e9506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bff990c7925edc33ee124c18f0e3ddb.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2455a48d59843042ff8150a3b8548cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17ca1e04c68f59bddc675411a0ea2fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61dd0bd398e182e636d519102aacc2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8578ad77f9f7fb2159f6a6e53bf2ff68.png)
(2)已知各项均为整数的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c4b9c60fdb001f63be75985dce0615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63f1709c28f68d64d9ea1134d68ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5453ec6a9e8b96357c888ea863ddcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a404bdf74c39673c894fd538f726801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f365ccab332ab4106a3fb8c6a07d618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73028194476dd7ed6f5e2dd150d99254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e48aa620084408ae9fd4470aa656d67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a404bdf74c39673c894fd538f726801.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c4b9c60fdb001f63be75985dce0615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63f1709c28f68d64d9ea1134d68ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5453ec6a9e8b96357c888ea863ddcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414656636a840bbb9a031d6103239fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9880952857950577055578875ab29141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25b2bbf7e0d8ad8306348d9057671f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f8d8c10b4f80f728744bbe722b68e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa9048c747a4a07468a44167e78c9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5894ed1f1641a511005398971c26496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b7e51b9389c91feffd0efc3c56dd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/182fb5c8bb9bc9768c8e72e5414f4e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba9d7201a345787d1b9cb58596664f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
您最近一年使用:0次
2022-10-20更新
|
337次组卷
|
2卷引用:北京师范大学附属实验中学2023届高三上学期第三次大单元测试数学试题
名校
3 . 已知等差数列
的公差为
,数列
的前
项和为
,且
.
(1)求数列
的通项公式;
(2)求数列
的前
项和
;
(3)请直接写出![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e4d98147bce5044d3d9ce09f8cf641.png)
的结果.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcf9f33389b83d32baf2f784435e80f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b74317b51005b9420a3904cce16615.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf679cb696a5d3dfb2364fbd6e0f456f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e4d98147bce5044d3d9ce09f8cf641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c6743e3e30669d643915df3cd2b54.png)
您最近一年使用:0次
4 . 在等差数列
中,已知
,
,
(1)求此数列的通项公式;
(2)若从此数列中依次取出第二项,第四项,第八项,……,第
项,……并按原来的先后顺序组成一个新的数列
,求数列
的通项公式与前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329785900390130a04a57d0b55aaa569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0607094bc7469f9433c4417ce026af8c.png)
(1)求此数列的通项公式;
(2)若从此数列中依次取出第二项,第四项,第八项,……,第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f31971306914638e5ceb1bbe437535d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2022-09-29更新
|
1276次组卷
|
6卷引用:北京市铁路第二中学2023届高三上学期期中考试数学试题
北京市铁路第二中学2023届高三上学期期中考试数学试题辽宁省本溪市本溪县高级中学2022-2023学年高三上学期第一次月考数学试题(已下线)第05讲 第六章 数列(基础拿分卷)(已下线)4.3.2.1 等比数列的前n项和(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)第7讲 数列求和9种常见题型总结 (1)(已下线)第5讲 等比数列的前 项和及性质6大题型总结 (1)
5 . 已知数列
的首项为1,对任意的
,定义
.
(1)若
,求
;
(2)若
,且
.
(i)当
时,求数列
的前
项的和;
(ii)当
时,求证:数列
中任意一项的值均不会在该数列中出现无数次.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5653b60d16ec4e653518f0562680250.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64734957a53307185890ebb40717af48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4352ef2a38ee56e0086a3edd719e93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cffa798b7c3f5225fa9e75320f1f3ae.png)
(i)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0d7fbcc396c7b646c31f60e32d9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f41be870e84c819362787849770519.png)
(ii)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2022-09-24更新
|
521次组卷
|
3卷引用:北京师范大学附属实验中学2023届高三上学期开学测试数学试题
解题方法
6 . 已知数列
的首项
.
(1)若
是公差
的等差数列,正整数k,
,证明:
.
(2)若
是公差
的等差数列,正整数k,
,证明:
.
(3)若数列
满足
为一个自然数集上的正值函数,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd3f44bcf5b9431232653aeea90ac40.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7b00f044bee0cf190d398e6feaffb4.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc45743b14774d709f901027b0d235c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4b34c133b6a70da053d8417c1f150e.png)
您最近一年使用:0次
解题方法
7 . 已知数列
是公差d不等于0的等差数列,且
是等比数列,其中
.
(1)求
的值.
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec07a126ada2c921c5b4337f77854cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9dbae694b72b50409733bce52398b83.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373ecb5531c1593f13a0ed081597b3cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b653cc33c01873e1105a74a21d47dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2685c6c2ee7d0cfdd8ebef4c6ee43852.png)
您最近一年使用:0次
8 . 已知
是公差不等于0的等差数列,且
是
的等比中项,记数列
的前n项和为
,
.
(1)求数列
的通项公式.
(2)设数列
满足
,且
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0aee0e1147433ed2d3f40ca1baab3cb.png)
![](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/9a39dabf1d2cb4094bd2178576970d29.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ee020c21b69d1926068b29f3368101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcba622ae8d5e614f5f59982ce9b9b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
9 . 已知数列
的前
项和为
,且
,请在①
;②
成等比数列;③
,这三个条件中任选一个补充在上面题干中,并解答下面问题.
(1)求数列
的通项公式;
(2)若数列
是公比为2的等比数列,
,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/c3d80fae39643a1ab1ba2c9b8edbc919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1842a4808b6763a962335accbc06bef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6143ff1743d17cc9c92f44dbcca18359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2243888a494faf3e899eaff6e8fc123.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79768a4e3970a18741cee3fbd8bcbdad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4995fa0403e013d888c0935ebfe15024.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
22-23高三上·北京房山·开学考试
解题方法
10 . 设
和
是两个等差数列,记
,其中
表示
这
个数中最小的数.
(1)若
,
,求
的值;
(2)若
,
,证明
是等差数列;
(3)证明:或者对任意实数
,存在正整数
,当
时,
;或者存在正整数
,使得
是等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec5456cafab2bd861b17181ac14f70e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b843e0dc4116c34c56f0c92c8c7ccd6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb05531d4fd9e4c4926c18b427ce090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf6e05fd55462f9c5acca3cf6ee46e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfd5bf623242a22364d6fb33731cf7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900b1d4f3f32b401c8e3d788df7035b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a08cafcb17e29f58f496c92a53df3bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a8100f98999e472945ab7050af50d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae491c2bb3517ac6b65745870b500636.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fd15570bcd1cc1228fd3929a7c3f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a8100f98999e472945ab7050af50d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
(3)证明:或者对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856b137a34d2d5b20671b7a3c7a29606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8b754f5002b4db372cc622c99252c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75942dc6020cdaef88c28a9a077e5b08.png)
您最近一年使用:0次