1 . 在数列
中,
.
(1)求
的通项公式;
(2)设数列
满足
,数列
前
项和为
.
在①
,②
中任意选择一个,补充在横线上并证明.选择___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63454e1a48ec849c87b4c955d9359e5.png)
(1)求
![](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/0024023fd4d2a065ed3a82065b348e86.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)
在①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b08554c70143d07353f2d4cfba08b37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41237d2f0ab9fdfbd699ef3f0bd5cda3.png)
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2022-08-21更新
|
360次组卷
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2卷引用:浙江省新高考研究2023届高三上学期8月测试数学试题
名校
解题方法
2 . 记
为数列
的前
项和,已知
是首项为3,公差为1的等差数列.
(1)求
的通项公式;
(2)证明:当
时,
.
![](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/774d4e5dfe56a15c4a0c17009a369265.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce170fe3183138e8dc57d1da368e929.png)
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2022-08-27更新
|
1264次组卷
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5卷引用:云南省楚雄州天人中学2022-2023学年高三上学期开学数学试题
名校
解题方法
3 . 已知首项为2的数列
满足
,记
.
(1)求证:数列
是一个等差数列;
(2)求数列
的前10项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e517255117c891de217f6b3b5ad31806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a27de74338f682be07230b3161f339a.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e33482c166594561e6ffdc252eb9b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3cf6f2bbe20a404fea41a4d2b1c4c7.png)
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2022-05-03更新
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3卷引用:广东省中山市中山纪念中学2023-2024学年高二下学期二月份综合测练(开学考)数学试卷
解题方法
4 .
为数列
的前n项和,已知
,
.
(1)求数列
的通项公式;
(2)证明:当
时,
.
![](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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df01497579180f1b175ac5b4014a811.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7bbad9eda33f5c8a810edf55810b21.png)
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2022-08-22更新
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3卷引用:贵州省遵义市新高考协作体2023届高三上学期入学质量监测数学(理)试题
5 . 在数列
,
中,
,
,
且
为正项等比数列.
(1)求
的通项公式;
(2)证明:
.
![](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/38795ba10dc132a5c881c55662c59481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bdb8aaf564b8e84435e382a9109ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151982f945a2fb3f872b6ad6770513b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbae76eccc529fb9401ec658f9a6ceb2.png)
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解题方法
6 . 已知数列
的首项
,
,
.
(1)证明:
为等比数列;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdb490d98f7c529c4cd46bbf7d5a7ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb23f1b6940b40353ca3d6397d5c21e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098d9e65e9676e4386c5d861c8eb03b5.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf4dcb75939c6eb36109e33b7b043ab.png)
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2022-09-15更新
|
1198次组卷
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2卷引用:辽宁省六校2022-2023学年高三上学期期初考试数学试题
名校
解题方法
7 . 已知
为数列
的前
项和,
是公差为1的等差数列.
(1)求
的通项公式;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb2fb45db89edf57c1e70d6c03640ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd9aa5ea928f401f91440cfa7870c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5101d02b3c246fe680bcc50a4bc5836d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd9aa5ea928f401f91440cfa7870c83.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8dd99dba987abc303cfbdbf9dbab1d.png)
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2022-09-06更新
|
529次组卷
|
3卷引用:四川省达州市开江县开江中学2022-2023学年高三上学期入学考试数学(文)试题
解题方法
8 . 已知正项数列
的首项为
,且满足
,
.
(1)求证:数列
为等比数列;
(2)记
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9cca946f012121f04c0fdc8afa6ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce19f3504ea1e60adaad77aaac257a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be542b2c2e5cf73ebed50727f9a0875.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e023babba36e1e3987e7398866602f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2022-02-13更新
|
501次组卷
|
2卷引用:浙江省温州市瑞安市第六中学2021-2022学年高二下学期入学检测数学试题 .
9 . 在数列
中,
,且
,
.
(1)求
的通项公式;
(2)若
,且数列
的前项n和为
,证明:
.
![](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/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f3ea78677c688751c16f99372026bd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f465a44170e765ed018eeca0d3054dc.png)
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2022-08-28更新
|
995次组卷
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4卷引用:陕西省渭南市华州区咸林中学2022-2023学年高三上学期开学摸底考试文科数学试题
名校
解题方法
10 . 已知数列
的首项为1,满足
,且
,
,1成等差数列.
(1)求
的通项公式;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a64135412e48c1164a2c60042c80c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4fc983acad74f5cf3d4168edac85b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e503e95b7980f0bc00f99163be194f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c57511234ca14acc3495f189c0742c1.png)
您最近一年使用:0次
2022-08-27更新
|
499次组卷
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5卷引用:湖南省三湘创新发展联合2022-2023学年高三上学期起点调研考试数学试题