数列
、
、
、
、
、
的项数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0b71b8d2c183154221f717ce09077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627a57cd9fdb1f586f35d9825b6bcc0b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
10-11高一下·湖北宜昌·期中 查看更多[1]
(已下线)2010-2011学年湖北省长阳一中高一第二学期期中考试理科数学卷
更新时间:2011-04-28 10:35:48
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【推荐1】已知数列
中,
,
,则
等于( )
![](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/53271336649378a043f9da8b8bdc1cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a50f815f27b1c935fe28935cb2d3ff.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】2023年10月29日,“济南泉城马拉松”在济南大明湖路拉开序幕,约3万名选手共聚一堂,在金秋十月享受了一场酣畅淋漓的马拉松盛会.某赞助商在沿途设置了10个饮水补给站,第一个补给站准备了1千瓶饮用水,第二站比第一站多2千瓶,第三站比第二站多3千瓶,以此类推,第n站比第
站多n千瓶(
且
),第10站准备的饮用水的数量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aadf9ab510510120699c5eee39ab18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
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A.45千瓶 | B.50千瓶 | C.55千瓶 | D.60千瓶 |
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【推荐1】已知
表示数列
的前
项和,若对任意的
都有
成立,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4da29f65fd37c094066b6dcd42eb296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb334e165679c6cb500c994cffa47147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ed16bc1ac15e077c44956797fa3de1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】设等差数列
的前
项和为
,且满足
,
,则当
取得最大值时,n的值为( )
![](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/ed9a8fb948910f3fab756e6af9f4bc9a.png)
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A.6 | B.7 | C.6或7 | D.8 |
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【推荐2】已知等差数列
和等比数列
均为递增数列,且
,
,若
,则k的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
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A.3 | B.4 | C.5 | D.6 |
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