1 . 已知数列
的前n项和为
,
,
.
(1)证明:数列
为等比数列;
(2)设
,记数列
的前n项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73028194476dd7ed6f5e2dd150d99254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0182d672fc23d2523b63914cb8af2223.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bc7a061ab7ac4facfeadecd21067ad.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f805c9fcdb0ae5fee6ded2bb1464e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195431ccf2756a0db26f14b7b91a32a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1524ab64dde0d01b9fe2016a9f7cd1.png)
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2022-10-12更新
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5卷引用:河南省信阳市普通高中2022-2023学年高三第二次教学质量检测数学(文科)试题
河南省信阳市普通高中2022-2023学年高三第二次教学质量检测数学(文科)试题浙江省十校联盟2022-2023学年高三上学期10月联考数学试题(已下线)4.3.2.2 等比数列的前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)第四章 数列(单元测试卷)云南省昆明市嵩明县2024届高三上学期期中考试数学试题
名校
解题方法
2 . 数列
中,
为
的前
项和,
,
.
(1)求证: 数列
是等差数列,并求出其通项公式;
(2)求数列
的前
项和
.
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e1d65c1a1218c3debb4604fbb97ed7.png)
(1)求证: 数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ee300c6184e79e9f55bfac27ac73cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2022-11-04更新
|
765次组卷
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2卷引用:河南省南阳市2022-2023学年高三上学期期中数学理科试题
3 . 已知数列
满足
,且
,
.
(1)证明:数列
是等差数列,并求数列
的通项公式;
(2)记
,
,
.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352d9b76dcf639368fa68cae70149802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1167e4c2f78eca42bd9acf22dbd413f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3e74fcd0b38bb7bbe6f0d8d2d4a256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ad80fd8f90b511ed19cbe3f7ab3919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf48cd99db12af9a0652d37ffbbd348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66ffdec6617f56a0ae6825b782e0094.png)
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2023-04-23更新
|
810次组卷
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2卷引用:河南省五市2023届高三二模数学试题(理)
4 . 数列
满足
.
(1)证明数列
是等比数列,并求出数列
的通项公式;
(2)设数列
满足
,证明:对一切正整数
,有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0b31dd7e39639a72559152d2a0404d.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c65a855b1eed9c43e6829f6c3bffb.png)
![](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/21d3a589626e7a58b3a919e9f39bb01e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446a69e8f2b8d3b662492672e9380b43.png)
您最近一年使用:0次
5 . 数列
中,
,
,(
).
(1)试求
、
的值,使得数列
为等比数列;
(2)设数列
满足:
,
为数列
的前n项和,证明:
时,
.
![](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/483bf3858e5dcdb2bcd2532d232aabda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c369e9f0c7c902ce7403137100514152.png)
(1)试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1761de3795504d0ec416973430e3458d.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672516b4ca5b692fecc28b136ed6485d.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/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d14b0575455c8410b887fa8c4259a4.png)
您最近一年使用:0次
解题方法
6 . 已知数列
的前n项和为
.
(1)求
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/c4c290151eea9c0c4d571b251cc8ded0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6d63e220f779a1976afaae427278da6.png)
![](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/bd5f60d97a15871fac092313fca59189.png)
您最近一年使用:0次
名校
解题方法
7 . 在各项均为正数的数列
中,
,
.
(1)求
的通项公式;
(2)若
,
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5703bea4cc02babe1c7f951b06698aee.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099eeac1f133e1b518e74624bb6a6bbb.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/14513acfd0fef2445dc3946dae40b68a.png)
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2023-03-23更新
|
1290次组卷
|
3卷引用:河南省开封高级中学2022-2023学年高三下学期核心模拟卷(中)理科数学(一)试题
8 . 数列
满足
,
,设
.
(1)证明:数列
为等比数列;
(2)设
,求数列
的前n项和为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6065aaa8f3f103d1bc960da8318ce35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffd27df03b1af7ad1e98eedb7f47e35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf59c5d46e08807a0da6f8d52bfb6fb.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a3142edf5c4c0da42010fbbd78a099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2023-03-23更新
|
453次组卷
|
2卷引用:河南省南阳市第一中学校2022-2023学年高二下学期第一次月考数学试题
名校
解题方法
9 . 已知首项为1的递增的等差数列
的前n项和为
,若
成等比数列.
(1)求
和
;
(2)求证:
![](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/37c0609f48ac7e62a55034ddd1be679d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8547379b2709230dfa6f4e52462c9b0a.png)
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2022-07-20更新
|
328次组卷
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2卷引用:河南省周口市周口恒大中学2023-2024学年高二下学期5月月考数学试题
名校
解题方法
10 . 已知正项数列
的前
项和为
,且
.
(1)证明:
是等差数列.
(2)设数列
的前
项和为
,若满足不等式
的正整数
的个数为3,求
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/f9295f2addeeddbc3250bf55b7d215cd.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0d58a97a8cebc0ff57ed57b4a3ed84.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/4926941ae3d14b022fabbb840095aedb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2023-02-19更新
|
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5卷引用:河南省新乡市2022-2023学年高二上学期期末数学试题