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( )
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A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2024-05-28 00:01:06
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解题方法
【推荐1】“0,1数列”在通信技术中有着重要应用,它是指各项的值都等于0或1的数列.设A是一个有限“0,1数列”,
表示把
中每个0都变为1,0,每个1都变为0,1,所得到的新的“0,1数列”,例如
,则
.设
是一个有限“0,1数列”,定义
,
、2、3、
.则下列说法正确的是( )
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A.若![]() ![]() |
B.对任意有限“0,1数列”![]() ![]() |
C.![]() ![]() |
D.若![]() ![]() ![]() |
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【推荐2】已知数列
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,
,记数列
的前n项和为
,则( )
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A.![]() | B.任意的![]() ![]() |
C.![]() | D.![]() |
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【推荐1】已知数列
满足
(
且
),则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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A.![]() ![]() |
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C.数列![]() ![]() ![]() |
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【推荐2】 已知
是数列
的前
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,则( )
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A. ![]() |
B. ![]() |
C. 当![]() ![]() |
D. 当数列![]() ![]() ![]() |
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【推荐1】已知数列
的通项为
,前
项和为
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A.如果![]() ![]() ![]() ![]() |
B.如果![]() ![]() ![]() ![]() |
C.如果![]() ![]() ![]() ![]() |
D.如果![]() ![]() ![]() ![]() ![]() ![]() |
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【推荐2】已知无穷数列
,
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,
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A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若等比数列![]() ![]() |
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