名校
1 . 在数列
中,若
,前
项和
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329785900390130a04a57d0b55aaa569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58614cd95e61cc2e69e30dbe745b7747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2023-07-27更新
|
1022次组卷
|
4卷引用:重庆市巴蜀中学校2024届高三上学期适应性月考(一)数学试题
2 . 已知数列
满足
,令
,设
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d433517d14291abf6a38f29e75b691.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fabfb944d91ce8a01e5fa656d5e432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25b075f3002d83c9bedb113dc04b4f1.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d433517d14291abf6a38f29e75b691.png)
您最近一年使用:0次
名校
解题方法
3 . 已知等差数列
的前
项和为
,若
,且
、
、
三点共线(该直线不过原点
),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25673902449184f5727cbc786aa82a0.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/b79b1982899043570f3715f758b382bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.png)
您最近一年使用:0次
名校
解题方法
4 . 记等差数列
的前
项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dcc73a71b205259c160d0f1fd87ca86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
您最近一年使用:0次
2020-03-20更新
|
499次组卷
|
6卷引用:重庆市巴蜀中学2019-2020学年高三下学期3月质量检测数学(文)试题
名校
5 . 已知等差数列
的前
项和是
,
,且
成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db762ef23cf84861051d488d749a73dd.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/2955370028ae5a872079c12bfedc3b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905b83ee6f3df203df322d994a655185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db762ef23cf84861051d488d749a73dd.png)
您最近一年使用:0次
2020-01-13更新
|
692次组卷
|
4卷引用:重庆市巴蜀中学2019-2020学年高三下学期期中(线上)数学(理)试题
名校
6 . 已知等差数列
前n项和为
,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d9a6092341b5e9a657bbc153948149.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7dccc8cf983099a6fb7286a5d630b0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d9a6092341b5e9a657bbc153948149.png)
您最近一年使用:0次
名校
7 . 设等差数列
的前
项和为
,若
,
,则
的最小值为______ .
![](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/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fcd86b9ed6819116a261629f96fae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc6d7facb6d528d0df5dfbbd944bc00.png)
您最近一年使用:0次
2019-11-21更新
|
410次组卷
|
2卷引用:重庆市渝中区巴蜀中学2019-2020学年高考适应性月考卷(三)数学(理)试题