名校
解题方法
1 . 已知数列
的前
项和为
且
.
(1)求
的值;
(2)求数列
的通项公式.
![](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/2edeb1f47dfcc97e3317bd3b66c84517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719e94710a63590224b23fd7c2bd65f5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05201ef79a5d5904f492845396fb5470.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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2024-04-12更新
|
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2卷引用:内蒙古呼和浩特市2024届高三第一次质量数据监测文科数学试卷
2 . 已知等差数列
的前n项和为
,
,
.
(1)求
的通项公式及
;
(2)设______,求数列
的前n项和
.
在①
;②
;③
这三个条件中任选一个补充在第(2)问中,并求解.
注:如选择多个条件分别解答,按第一个解答计分.
![](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/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c37c31311ad9869f54a3c2d4fd4dccd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)设______,求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
在①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ea54fa1afcfdbdb33d3a97efa7f697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea451369913dd8fd4945fe54ba1d2646.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.png)
注:如选择多个条件分别解答,按第一个解答计分.
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解题方法
3 .
为数列
的前
项和.已知
,
.
(1)求
的通项公式;
(2)设
,求证:数列
的前
项和
.
![](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/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61cc942eaa2c2d9f47608ddfcdd716c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa33d6f116c61ab89224c1a9886861cd.png)
您最近一年使用:0次
4 . 数列
中,
是数列
的前
项和,已知
,数列
为等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd8ec8ac2afe4a3c371b0650d77306e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/325dd5cdd6cf6c76d4cdab7853258d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
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2024-04-10更新
|
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2024·全国·模拟预测
5 . 在公差不为0的等差数列
中,
,且
成等比数列.
(1)求
的通项公式;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1031daed317fb00a3a29d294c66ed43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48de69bccfa328f51b7b8b0b686d6122.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec095ec628c5f3f5337225164a583c8.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
名校
解题方法
6 . 记
为数列
的前
项的和,已知
.
(1)求
的通项公式;
(2)令
,求
.
![](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/ad9970be153d5bc94fced3c3398218d8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bfb8b7901c41452b255cbb89cc1e924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317542d0087c1195a007de1baebef212.png)
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7 . 将数列
中的所有项排成如下数阵:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e8b6874e9a9aa556c3f20b5aee10b3.png)
从第2行开始每一行比上一行多两项,且从左到右均构成以2为公比的等比数列;第1列数
成等差数列.若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e8b6874e9a9aa556c3f20b5aee10b3.png)
从第2行开始每一行比上一行多两项,且从左到右均构成以2为公比的等比数列;第1列数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fafb2c9dc009e55279dc82ed9d077bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f011fa1cd53260ccffc298dc04e0a944.png)
A.![]() | B.![]() |
C.![]() | D.2024在数阵中出现两次 |
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名校
8 . 设等差数列
的公差为
,则“
”是“
为递增数列”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1abdf96d28023f6fe0f492e2bca2df8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8927e6db7dc997cc59ddb0ff5900c36.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
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|
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6卷引用:北京市东城区2023-2024学年高三下学期综合练习(一)(一模)数学试题
北京市东城区2023-2024学年高三下学期综合练习(一)(一模)数学试题(已下线)模块3 第3套 全真模拟篇四川省成都市石室阳安学校2024届高三下学期4月月考数学(文)试题(已下线)数学(新高考卷01,新题型结构)广西梧州市、忻城县2024届高中毕业班5月仿真考试数学试卷贵州省贵阳市清华中学2024届高三下学期5月高考临考预测数学试题
9 . 已知在单调递增的等差数列
中,
与
的等差中项为8,且
,则
的公差
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/163546e57d9e8002c7111a2f11de39df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
A.5 | B.4 | C.3 | D.2 |
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10 . 已知
为公差为2的等差数列
的前
项和,若数列
为等差数列.
(1)求
;
(2)求数列
的前
项和.
![](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/832fd7a51831135b6ee6a01981db250e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c0adc9baa0a2bc60e4d8d89e03283c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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1283次组卷
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