1 . 用数学归纳法证明“当
时,
能被31整除”时,从
到
时需添加的项是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcb6f3e38a50c2db7f16cfcd1f3be03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b00f4eb7f1bd2ccefbabf0c1dfa8f69.png)
您最近一年使用:0次
2 . 用数学归纳法证明:
(1)
;
(2)
;
(3)设
,证明:
;
(4)
是13的倍数
;
(5)
,证明
能被
整除.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/314ff1b297c2bb46771d8284f7343cbb.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afbbde509041612c6b38055387313fb.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a107c4e15ac17f3abf94f1f2520f425d.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b386f8738796b5e56ebe5ce8182c6e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/035937c12508091015aefe47f6c50519.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef78a5678fc2723cb0250590c44412e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c956687507dc801f7ce2c2b376868c1.png)
您最近一年使用:0次
3 . 证明
能被9整除
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bac9616c6542097052bd6481ad5863f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5bc2b05dc79b18ecb4ac3f9b5c492d4.png)
您最近一年使用:0次
2020-06-26更新
|
155次组卷
|
4卷引用:沪教版(上海) 高三年级 新高考辅导与训练 第四章 数列与数学归纳法 三、数学归纳法
沪教版(上海) 高三年级 新高考辅导与训练 第四章 数列与数学归纳法 三、数学归纳法苏教版(2019) 选修第一册 必杀技 第四章 4.4 数学归纳法(已下线)课时23 数学归纳法及其应用-2022年高考数学一轮复习小题多维练(上海专用)(已下线)4.4 数学归纳法(1)
4 . 用数学归纳法证明:
(1)
能被264整除;
(2)
能被
整除(其中n,a为正整数)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f487a452e8b349a4289448bb9a8c0e96.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9b8d9a6ee7f7f0d8e295d95a395eaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c956687507dc801f7ce2c2b376868c1.png)
您最近一年使用:0次
5 . 用数学归纳法证明
能被
整除的第二步中,当
时,为使用归纳假设,对
可变形为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e71307382f75193aa97c48c45d9abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5453184e251cfe787b5965cd38426962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba21f3d0cfc86d40e2e06446623ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98ecba05949cec960411d59ad520acb.png)
您最近一年使用:0次
2019-11-09更新
|
183次组卷
|
2卷引用:沪教版 高二年级第一学期 领航者 第七章 单元测试卷
6 . 用数学归纳法证明:
(
)能被9整除.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d273ae766e184488d6d0d6a55066db1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
您最近一年使用:0次
2017-05-18更新
|
699次组卷
|
2卷引用:高中数学解题兵法 第六十六讲 配凑法
7 . 设n∈N*,f(n)=3n+7n-2.
(1)求f(1),f(2),f(3)的值;
(2)证明:对任意正整数n,f(n)是8的倍数.
(1)求f(1),f(2),f(3)的值;
(2)证明:对任意正整数n,f(n)是8的倍数.
您最近一年使用:0次
解题方法
8 . 对由
和
这两个数字组成的字符串,作如下规定:按从左向右的顺序,当第一个子串“
”的最后一个
所在数位是第
(
,且
)位,则称子串“
”在第
位出现;再继续从第
位按从左往右的顺序找子串“
”,若第二个子串“
”的最后一个
所在数位是第
位(其中
且
),则称子串“
”在第
位出现;……;如此不断地重复下去.如:在字符串
中,子串“
”在第
位和第
位出现,而不是在第
位和第
位出现.记在
位由
组成的所有字符串中,子串“
”在第
位出现的字符串的个数为
.
(1)求
的值;
(2)求证:对任意的正整数
,
是
的倍数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9aae758f914e656a72d570256f289a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e36bff57bcfa86432b340e25e51d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835c74bbb8c61dd2d2f008664a8c8810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9aae758f914e656a72d570256f289a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f6cab5c7b276f18647f2e95d431c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9aae758f914e656a72d570256f289a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9aae758f914e656a72d570256f289a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c1f67db718129332f56462f9049f8c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527093b2ec760913d0dccff8a099248b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a949b947e9961d4d68bfeb4e24ef40f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9aae758f914e656a72d570256f289a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c1f67db718129332f56462f9049f8c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ce7d97b979dc160333b35d0538345a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9aae758f914e656a72d570256f289a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0b71b8d2c183154221f717ce09077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d217476e50c6bc37820f06eec6eb3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9aae758f914e656a72d570256f289a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9f73e6410a03924189326343e75553.png)
(2)求证:对任意的正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212385df8551a959b60caf0b0c9776d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
您最近一年使用:0次
9 . 用数学归纳法证明:三个连续正整数的立方和可以被9整除.
您最近一年使用:0次
2019-11-09更新
|
153次组卷
|
4卷引用:沪教版 高二年级第一学期 领航者 第七章 7.5数学归纳法的应用
10 . 用数学归纳法证明
能被8整除时,当
时,
可变形为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cecfb96a5d894cafff18d407552451d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba21f3d0cfc86d40e2e06446623ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24fe6661e254a21b3a3df7d626ac4469.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2017-11-27更新
|
927次组卷
|
4卷引用:2016-2017河北武邑中学高二上周考9.25理数学试卷
2016-2017河北武邑中学高二上周考9.25理数学试卷(已下线)同步君人教A版选修2-2第二章2.3数学归纳法高中数学人教版 选修2-2(理科) 第二章推理与证明 2.3数学归纳法(已下线)4.4 数学归纳法(3)