1 . 冒泡排序是一种计算机科学领域的较简单的排序算法.其基本思想是:通过对待排序序列
从左往右,依次对相邻两个元素
(
,2,
,
)比较大小,若
,则交换两个数的位置,使值较大的元素逐渐从左移向右,就如水底下的气泡一样逐渐向上冒,重复以上过程直到序列中所有数都是按照从小到大排列为止.例如:对于序列
进行冒泡排序,首先比较
,需要交换1次位置,得到新序列
,然后比较
,无需交换位置,最后比较
,又需要交换1次位置,得到新序列
,最终完成了冒泡排序.同样地,序列
需要依次交换
,
完成冒泡排序.因此,
和
均是交换2次的序列.现在对任一个包含n个不等实数的序列进行冒泡排序(
),设在冒泡排序中序列需要交换的最大次数为
,只需要交换1次的序列个数为
,只需要交换2次的序列个数为
,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed7b442e78e34e20513eda80b994057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7d2b73d53e55ed235678b902b04b5f0.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aadf9ab510510120699c5eee39ab18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ef7fb37eb0663328147e890fe3743ec.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59e7c7a84a4bdb959e95536d0404ceb.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 若正项无穷数列
是等差数列,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aca46766c0a0c10fc0c8d4c35868ccd.png)
A.![]() |
B.当![]() ![]() |
C.公差d的取值范围是![]() |
D.当![]() ![]() |
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3 . 中国载人航天工程发射的第十八艘飞船,简称“神十八”,于2024年4月执行载人航天飞行任务.运送“神十八”的长征二号
运载火箭,在点火第一秒钟通过的路程为
,以后每秒钟通过的路程都增加
,在达到离地面
的高度时,火箭开始进入转弯程序.则从点火到进入转弯程序大约需要的时间是( )秒.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2391c0e2fc44598610d519dacb778062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26016c9a610be4da74086a37c3327d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65cce51b851717ccbd705588d77802b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c56353ccb7d9002b70856c615a8ce06.png)
A.10 | B.11 | C.12 | D.13 |
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4 . 已知等差数列
的前
项和为
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/09f6418de1b3f59f27649f4c9d18404b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2a4487df151b79412814f5f90e5767c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b625192d7398634a02ea24fa78ed87.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 设
为等差数列
的前
项和,若
,则
( )
![](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/7333e9cd5ee065f23bed782578f9565e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
A.10 | B.15 | C.![]() | D.5 |
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6 . 记
为等差数列
的前
项和,若
则数列
的前2024项和为( )
![](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/30795179076175f551f2f3a6b9812e92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcbed45abaf91085202ed55d1a19000e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 已知等差数列
满足
,前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
______________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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![](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/dc4e70b360f988fdbd92300ab22c4613.png)
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8 . 已知数列
是公差为
的等差数列,
是其前
项和,且
,
,则( )
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179513ce80436471efbe1d9b31735f7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7bc3951fd67f412605e7d18365dace5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 生命在于运动,某健身房为吸引会员来健身,推出打卡送积分活动(积分可兑换礼品),第一天打卡得1积分,以后只要连续打卡,每天所得积分都会比前一天多2分.若某天未打卡,则当天没有积分,且第二天打卡须从1积分重新开始.某会员参与打卡活动,从3月1日开始,到3月20日他共得193积分,中途有一天未打卡,则他未打卡的那天是( )
A.3月5日或3月16日 | B.3月6日或3月15日 |
C.3月7日或3月14日 | D.3月8日或3月13日 |
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10 . 已知等差数列
的前
项和为
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edd44d98573889529aa03249d45e26.png)
(1)求数列
的通项公式
,及前
项和
;
(2)数列
满足
为数列
的前
项和,是否存在正整数
,使得
?若存在,求出
的值;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/93edd44d98573889529aa03249d45e26.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a5e8f54831865b355e957748390444.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/24a8ec4cfcd72e12438d1c28d6cbc259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c49de90cc45761c1c2781f3e6856eedd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee956329e95a172d86c86b2f6af7aec.png)
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