名校
1 . 已知圆
和点
,若过点
的5条弦的长度构成一个等差数列,则该数列公差的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc913bc204342a3c2e9d80d13078fb8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea24674c37fad354909efce890a94918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() | B.![]() | C.1 | D.2 |
您最近一年使用:0次
名校
2 . 等差数列
的前
项和为
,则( )
![](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/624ca995c3095ac6ffd1a7d0d3acf2ed.png)
A.![]() | B.![]() |
C.![]() | D.当![]() ![]() |
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解题方法
3 . 已知等差数列
的前
项和为
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/085815a00e808681cc51bfdfb6a9ffe9.png)
(1)求数列
的通项公式;
(2)设
,求数列
的前
项和为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/085815a00e808681cc51bfdfb6a9ffe9.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a9d06d857cea382c6ef2f8bc9d35ef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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4 . 已知数列
的首项
,且满足
,数列
的前
项和
满足
,且
.
(1)求证:
是等比数列;
(2)求数列
的通项公式;
(3)设
,求数列
的前
项和
.
![](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/7508a63d0d5e6baf68c0765596f3627a.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/4fad5c98708ea5ef0342473a072893d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0dd3fb6af23def773e1b0032a4f3c5.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7695d7b6905ff9d4cd9b063028cc092.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4688e74af6fbae5ffbe9e30b36d7ea8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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5 . 已知
为等差数列,
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6746f814078c1dbb603165264a9b1b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.png)
A.21 | B.17 | C.23 | D.20 |
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2024-04-30更新
|
585次组卷
|
2卷引用:湖北省部分省级示范高中2023-2024学年高二下学期4月期中测试数学试题
名校
解题方法
6 . 设
是公差为d的等差数列,
为其前项的和,且
,
,则下列说法正确的是( )
![](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/8068eadc82d20e4897574a99b47de079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a010897a5bd4d852c92e8926ec1e794d.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() ![]() |
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2024-03-20更新
|
1089次组卷
|
4卷引用:湖北省武汉市吴家山第四中学2023-2024学年高二下学期期中考试数学试卷
名校
7 . 已知等差数列
中,
,
,若在数列
每相邻两项之间插入三个数,使得新数列也是一个等差数列,则新数列的第41项为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1928c254cfada1f75a5cd1e34db5a63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29b6d31d8d6e75388ae4304fce5258d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2024-03-15更新
|
309次组卷
|
2卷引用:湖北省武汉市吴家山第四中学2023-2024学年高二下学期期中考试数学试卷
8 . 已知等差数列
的前
项和为
,现给出下列三个条件:①
;②
;③
.请你从这三个条件中任选两个解答下列问题.
(1)求
的通项公式;
(2)若数列
满足
,设数列
的前
项和为
,求证:
.
注:如果选择多个条件分别进行解答,按第一个解答进行计分.
![](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/3a99cf16ceeb013295f2f587aa0310a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81470057de8530a5f09db1605fa9a922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aab0fb9d6a1cf5d9c57f02974325834.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b183fd7e7d2afb1cd1ca6115ea196fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30136113176ba7fe660e998d0873157.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/f1cb91e89800a81f4d62ed75c3ace24a.png)
注:如果选择多个条件分别进行解答,按第一个解答进行计分.
您最近一年使用:0次
2023-08-18更新
|
453次组卷
|
4卷引用:湖北省恩施州高中教育联盟2023-2024学年高二下学期4月期中考试数学试题
湖北省恩施州高中教育联盟2023-2024学年高二下学期4月期中考试数学试题(已下线)模块三 专题3 高考新题型专练(专题1:劣构题专练)(北师大)(高二)甘肃省武威市四校联考2024届高三上学期新高考备考模拟(开学考试)数学试题(已下线)模块三 专题8 大题分类练 劣构题专练 拔高 期末终极研习室高二人教A版
名校
解题方法
9 . 在等差数列
中,
,那么该数列的前14项和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2053b334aad10be11c4f7abffefa884.png)
A.20 | B.21 | C.42 | D.84 |
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2021-09-08更新
|
539次组卷
|
5卷引用:湖北省武汉市吴家山第四中学2023-2024学年高二下学期期中考试数学试卷