解题方法
1 . 已知数列
中,
,
(n
).
(1)分别比较下列每组中两数的大小:①
和
;②
和
;
(2)当n≥3时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ecf69901899bba130968c7a091790d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473292ef3cbf11a8118cd3afd4512ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010799cc7efae681c6de874fb6e3d053.png)
(1)分别比较下列每组中两数的大小:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bec36481482bb3d094cabbf87c61095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38a950be0540f6d8b7f8f9a81d6736d7.png)
(2)当n≥3时,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d8b4c76d90408154490e94e254d33d.png)
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2 . 数列
满足
.若存在实数
.使不等式
对任意
恒成立,当
时,
=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3276079c937be1dbdf4c3faacd9ebcd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6baa2eb274e9af7cc5c78b9b8f1fc13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-05-25更新
|
752次组卷
|
5卷引用:2020届浙江省杭州市高三下学期教学质量检测数学试题
2020届浙江省杭州市高三下学期教学质量检测数学试题浙江省杭州市2020届高三下学期5月高考模拟数学试题(已下线)4.4 数学归纳法(已下线)4.4 数学归纳法(练习)-2022-2023学年高二数学同步精品课堂(人教A版2019选择性必修第二册)(已下线)第8课时 课后 数学归纳法(选)
3 . 已知数列
和
的前
项和分别为
和
,且
,
,
,其中
为常数.
(1)若
,
.
①求数列
的通项公式;
②求数列
的通项公式.
(2)若
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ea014220aa658c8baa6e1f43e686a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ada913267398cc292bb7b69dae4cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec6fb9e0625b85be3103d317fbb0cca.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfec4233214c3a729c843dee0d186db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2753dc1c83d54044b89e628a7eb247f8.png)
①求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5344eadd4711db34e3f935aedd5fb270.png)
②求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec12a9a60f82467bf7bf834a9a9b1f7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b03536dc607a70a2cc597e739cb345f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f56a22d95eab351e09da1afb8153bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca788f0dfc8b34681bf6ef19b98ab1.png)
您最近一年使用:0次
4 . 超级细菌是一种耐药性细菌,产生超级细菌的主要原因是用于抵抗细菌侵蚀的药物越来越多,但是由于滥用抗生素的现象不断的发生,很多致病菌也对相应的抗生素产生了耐药性,更可怕的是,抗生素药物对它起不到什么作用,病人会因为感染而引起可怕的炎症,高烧,痉挛,昏迷甚至死亡.某药物研究所为筛查某种超级细菌,需要检验血液是否为阳性,现有n(
)份血液样本,每个样本取到的可能性相等,有以下两种检验方式:(1)逐份检验,则需要检验n次;(2)混合检验,将其中k(
且
)份血液样本分别取样混合在一起检验,若检验结果为阴性,则这份的血液全为阴性,因而这k份血液样本只要检验一次就够了;如果检验结果为阳性,为了明确这k份血液究竟哪几份为阳性,就要对这k份血液再逐份检验,此时这k份血液的检验次数总共为
次.假设在接受检验的血液样本中,每份样本的检验结果是阳性还是阴性都是独立的,且每份样本是阳性结果的概率为p(
).现取其中k(
且
)份血液样本,记采用逐份检验方式,样本需要检验的总次数为
,采用混合检验方式,样本需要检验的总次数为
.
(1)运用概率统计的知识,若
,试求P关于k的函数关系式
;
(2)若P与抗生素计量
相关,其中
,
,…,
(
)是不同的正实数,满足
,对任意的
(
),都有
.
(i)证明:
为等比数列;
(ii)当
时,采用混合检验方式可以使得样本需要检验的总次数期望值比逐份检验的总次数期望值更少,求k的最大值.
参考数据:
,
,
,
,
,
,
,
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e36bff57bcfa86432b340e25e51d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c972cbd63decec197aec1bdc306de67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b00f4eb7f1bd2ccefbabf0c1dfa8f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c11f6c800b8e0410674a0c6d307d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e36bff57bcfa86432b340e25e51d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c972cbd63decec197aec1bdc306de67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d388f32e318b0c7f2d9d10a5c6525b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90f1ce5bbcc57f96d99d2c4f27cc2e42.png)
(1)运用概率统计的知识,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd314aee9f06722598766b752fa1e73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb00792538f7ae7cd3303b465fada7a.png)
(2)若P与抗生素计量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60302649eb940748da818199e55da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e0971156c0d533e2bf52877ee6a74c.png)
(i)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
(ii)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c8f13606268b633ec8685a36743e8d.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0591d9f78b4f4f78c5bd6baaa602ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289ad328bffb5f497153dc0e59939257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4086cd22f9543d857140a3a8e0a7fec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3616e69114889d5d02099b6598a57136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401bda9057eb0da43fba681130b558f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3507fab2af0d78ae1fbbfa7d38cb146e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce9df6d6e8d920d2399bd24ad4a8bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4f947bec0390abfadff170732a0338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d54dec8bafe20965e9a2f685207a23e.png)
您最近一年使用:0次
解题方法
5 . 已知
为正整数,各项均为正整数的数列
满足:
,记数列
的前
项和为
.
(1)若
,求
的值;
(2)若
,求
的值;
(3)若
为奇数,求证:“
”的充要条件是“
为奇数”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24d47446575bc4452a752e5c57a2c025.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)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/225fa182b29b928a88047b1a25bed96d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194592cb77de8a597d5d64e1c85c3249.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ece9835e1c149f6d18bfeef3dd4b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c25b75041d4560cde97c287b30457f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f448fb2bd2ed4aa11d03a1a7b3f4cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
您最近一年使用:0次
名校
6 . 设
,那么
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44fafd0567e0d4a389b7d426daefede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582c158ee2e6e7a60b4c8cedd626eab4.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-05-19更新
|
1885次组卷
|
13卷引用:山西省太原市第二十一中学2019-2020学年高二下学期期中数学(理)试题
山西省太原市第二十一中学2019-2020学年高二下学期期中数学(理)试题陕西省延安市吴起高级中学2019-2020学年高二下学期第三次质量检测数学(理)试题(已下线)考点65 数学归纳法(讲解)-2021年高考数学复习一轮复习笔记(已下线)2.3 数学归纳法(重点练)-2020-2021学年高二数学(理)十分钟同步课堂专练(人教A版选修2-2)(已下线)突破4.4 数学归纳法课时训练-【新教材优创】突破满分数学之2020-2021学年高二数学课时训练(人教A版2019选择性必修第二册) (已下线)考点44 数学归纳法-备战2022年高考数学(理)一轮复习考点微专题(已下线)考点50 推理与证明-备战2022年高考数学(理)一轮复习考点帮(已下线)4.4 数学归纳法-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)(已下线)4.4数学归纳法C卷(已下线)第02周周练(4.3.1等比数列的概念4.3.2等比数列的前n项和公式4.4数学归纳法)(提高卷)宁夏回族自治区银川一中2022届高三二模数学(理)试题陕西省延安市第一中学2021-2022学年高二下学期期中理科数学试题1.5数学归纳法检测B卷(综合提升)
名校
解题方法
7 . 已知数列
满足
,
,则
的值是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c4d7fd0d98910c193461a9a8fdf00e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea40a1dc1596bf05dda56e58e6eb3410.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-05-15更新
|
320次组卷
|
5卷引用:2019届非凡联盟高三毕业班调研考试理数试题
2019届非凡联盟高三毕业班调研考试理数试题(已下线)考点44 数学归纳法-备战2022年高考数学(理)一轮复习考点微专题(已下线)考点50 推理与证明-备战2022年高考数学(理)一轮复习考点帮陕西省西安市第八十九中学2021-2022学年高二上学期12月第二次月考文科数学试题广西钦州市第四中学2022-2023学年高二下学期3月月考数学试题
8 . 在我国南宋数学家杨辉所著的《详解九章算法》一书中,用如图所示的三角形(杨辉三角)解释了二项和的乘方规律.右边的数字三角形可以看作当n依次取0,1,2,3,…时
展开式的二项式系数,相邻两斜线间各数的和组成数列
.例:
,
,
,….
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/959e3261-0d5e-4988-8a75-5a06e02faa95.png?resizew=383)
(1)写出数列
的通项公式(结果用组合数表示),无需证明;
(2)猜想
,与
的大小关系,并用数学归纳法证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5abcb3802cf02be93a8c89067bd49a.png)
![](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/2c2037221d1ac40cf28e2ef5d60e8edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0adbf307eef6f3610f342c57ddd275a6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/959e3261-0d5e-4988-8a75-5a06e02faa95.png?resizew=383)
(1)写出数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c587d225f909233b772abf6e6bed9a19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ebf2173007b30775097510495febcd.png)
您最近一年使用:0次
名校
9 . 已知等差数列
满足:
,前
项和为
,且
.
(1)求
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.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/d2263447ef265e0b6b0db6383297460c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b63b13ceae51c9f148eaf019c064d15e.png)
您最近一年使用:0次
名校
10 . 已知在数列
中,
,
,
,
,且对于任意
有
.
(1)求证:任意
,
;
(2)求证:任意
,
为整数.
![](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/f966272f7781790ff27e40db6b525253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb334e165679c6cb500c994cffa47147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0748c346ed88f98e424de8edf278325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8a287def438a6fd6d74204631695c1.png)
(1)求证:任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6be5dff124790a8caa4d3a14e1cdbe7.png)
(2)求证:任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de3420e78fcbec51715a469add961e8e.png)
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