名校
解题方法
1 . 已知等差数列的前三项依次为a、4,3a,前n项和为
,且
.
(1)求a及k的值;
(2)设数列{
}的通项公式为
,求数列{
}前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7037bb05f2fb67787d44f293fcce97be.png)
(1)求a及k的值;
(2)设数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44e8d0669e5bb98993cb10e0e7899b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2023-03-28更新
|
286次组卷
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3卷引用:广东省佛山市南海区南海中学2022-2023学年高二下学期第一次阶段考(3月)数学试题
21-22高三上·江苏南通·阶段练习
2 . 已知数列
的前
项和为
,
,
.
(1)若
成等差数列,求
的值;
(2)若
为等比数列,求
.
![](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/df29d91e33671de29c99f119f9cf4559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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2021-11-05更新
|
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7卷引用:广东省佛山市第四中学2021-2022学年高二下学期3月段考数学试题
广东省佛山市第四中学2021-2022学年高二下学期3月段考数学试题(已下线)第4章 数列(章末测试基础卷)-2021-2022学年高二数学同步单元测试定心卷(苏教版2019选择性必修第一册)江西省赣州市兴国县将军中学2021-2022学年高二上学期期中数学试题江苏省宿迁中学2022-2023学年高二上学期期中数学试题山东省枣庄市第三中学2021-2022学年高二上学期期末数学试题(已下线)江苏省南通市如皋市2021-2022学年高三上学期教学质量调研(一)数学试题2022届高三普通高等学校招生全国统一考试 数学预测卷(七)
名校
解题方法
3 . 已知数列
满足
,且
.
(1)求数列
的通项公式;
(2)设
,数列
的前n项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bdfd592f818d0fec5293076f6e7348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6246d3caa133d7449288206b880760.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2de4ff7eab82bdd9cf46dfa6e8a548.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/fc1f5d407c0e99344ed5f0f5926c5d22.png)
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2022-10-13更新
|
464次组卷
|
3卷引用:广东省珠海市斗门区第一中学2022-2023学年高二下学期6月阶段考数学试题
解题方法
4 . 已知数列
的前
项和为
.
(1)若
,求和:
;
(2)若
,证明:
是等差数列.
![](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)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff1c33b81ac2f065d37faef37504bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc6460a8052adf9c012aaf041ccfa109.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a833791dde24743185721660a8ebfb65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
名校
5 . 已知数列
的前
项和为
,满足
.数列
满足
,且
.
(1)求数列
和
的通项公式;
(2)是否存在正整数
使
成等差数列,若存在,求出所有满足条件的
;若不存在,请说明理由.
![](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/f985ba3b26e98eff61d15c39e627fa21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb0747f9aeec4b8baf1c00149c5076f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0b7489288d49ee8a5c4ba75b63b405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
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2023-09-05更新
|
209次组卷
|
2卷引用:广东省深圳市蛇口育才教育集团育才中学2022-2023学年高二下学期阶段检测(二)数学试题
名校
解题方法
6 . 数列
是首项
的等比数列,且
成等差数列.
(1)求数列
的通项公式;
(2)若
,设
为数列
的前
项和,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad50387394bfaee5ed262957f7979231.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca5f280b573d782f3eaca117b8db25d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c628c524008c196937474eb6168324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d51deec977623d2d8f3ca3a5600050f.png)
您最近一年使用:0次
名校
解题方法
7 . 已知函数
,
.
(Ⅰ)若
,解不等式
;
(Ⅱ)设
是函数
的四个不同的零点,问是否存在实数
,使得其三个零点成等差数列?若存在,求出所有
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e49948cb5d0925be201ed086845f1d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7fcc1dbd7485c0ff2a6e1ad4d871d34.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e9fa864472349a0094a4c8328e4536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ccd22fd0ca1a8e1468329284f91b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/190a6120c3330c51d0823c8bd8991b2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-11-08更新
|
813次组卷
|
5卷引用:广东省执信中学2019-2020学年高二上学期9月月考数学试题
广东省执信中学2019-2020学年高二上学期9月月考数学试题浙江省宁波市北仑中学2022-2023学年高二(1班)下学期期中数学试题浙江省丽水市2018-2019学年高一下学期期末数学试题(已下线)【新东方】杭州新东方高中数学试卷323(已下线)第23讲 零点问题之三个零点-突破2022年新高考数学导数压轴解答题精选精练
名校
解题方法
8 . 已知二项式
的展开式中仅第5项的二项式系数最大,且第4项,第5项,第6项的系数成等差数列.
(1)求
和n的值;
(2)当
,
,
时,若
恰好能被6整除,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/733917cece1f3c77ef307bc76745ff8f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b5471b5cd78e6b6ad2bb4a29a5b23a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e3b06aa0fa17a8b1e3c2123b2f8309c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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7日内更新
|
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|
2卷引用:广东省顺德区2023-2024学年高二下学期镇街联考数学试卷
名校
9 . 已知
是公比为
的等比数列,前
项和为
,且
,
,
,
.
(1)求
的通项公式;
(2)若对任意的
,
是
和
的等差中项,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71acdb04454c77e1e25ad4f336cccfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45482d31d1d7448c9f3922b4d2a55331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0268f9614a812d2d4f28ac94c96e50ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce35821130b2f1835d98aefb34287d74.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4ee290ea11c19717a17ae23bbe57906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d203593b5dadd90ee5e2b5b294ee5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6fc4f6a01980995471dc46eb79c4591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
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2022-07-26更新
|
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|
3卷引用:广东省佛山市南海区狮山石门高级中学2021-2022学年高二下学期第三次大测数学试题
名校
10 . 已知公差大于零的等差数列
的前
项和为
,且满足
,
.
(1)求数列
的通项公式;
(2)求
的最小值;
(3)若数列
是等差数列,且
,求非零常数
.
![](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/b75b2793adac495e60e2b9f004d5df73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80735b4ccb365831ac19a2ad06d3973.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e4a9bdb1a7d858f6fddd7b1b5c1793.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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2019-08-17更新
|
1079次组卷
|
3卷引用:广东省佛山市南海区第一中学2023-2024高二上学期第三次大测数学试卷