1 . 已知数列
满足
.
(1)求
的通项公式;
(2)若数列
满足,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f411d6c9d7fffc745109864b87592d0b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18210c50a94d40acdd8961eb53cf452e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7869d2197e851637534d277068cbca5b.png)
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2 .
是数列
前
项和,
,
,给出以下四个结论:
①
;
②
;
③
;
④
.
其中正确的是___________ (写出全部正确结论的番号).
![](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/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e3e4ba7281488a10eccca42c5e0d624.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4be8f3e3b84da3a835f8d1b32730c6bd.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e87dfcd3e0606d37e77e2557348702.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3545d85e07afd8526dc6913d6e8794d.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af8bd6b719beefdafd9e8237ff7eec0e.png)
其中正确的是
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名校
解题方法
3 . 已知数列
满足
.
(1)求
的通项公式;
(2)在
和
中插入k个相同的数
,构成一个新数列
,
,求
的前45项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e6dc2ce2677e214f85958e229fc390.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a382b81f0eb038ab3a695a9f036af3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2634c55078cb3eb4f92d31c6cb7eac07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46772d07f35e2d8aed7ff50895312b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbd5918045499f014531a9df562dce48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a0ca7cb01df3c8579bbdd8ca6012e7.png)
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2022-05-31更新
|
692次组卷
|
2卷引用:四川省泸州市泸县第二中学教育集团2022届高考仿真考试(三)理科数学试题
解题方法
4 . 将①
,
,②
,③
,
之一填入空格中(只填番号),并完成该题.
已知
是数列
前n项和,___________.
(1)求
的通项公式;
(2)证明:对一切
,
能被3整除.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bbb03e9f93969580c6f07667c209779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b109fa86a3b571445e5352e89e0af67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3db132af8f7366d6b98f8c5609756a7.png)
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:对一切
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235ed1dfea3ec3bc0c2d81a3cf66c202.png)
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2022-05-10更新
|
769次组卷
|
7卷引用:四川省眉山市2022届高中第三次诊断性考试数学(文史类)试题
四川省眉山市2022届高中第三次诊断性考试数学(文史类)试题四川省乐山市2022届高三下学期第三次调查研究考试数学(文)试题(已下线)数学归纳法(已下线)4.4 数学归纳法(1)1.4 数学归纳法(同步练习提高版)1.5 数学归纳法7种常见考法归类(1)(已下线)4.4数学归纳法——课后作业(巩固版)
5 . 已知数列
满足
,
,
为
的前n项和.
(1)求
的通项公式;
(2)设
,数列
的前n项和
满足
对一切正奇数n恒成立,求实数m的取值范围.
![](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/be29d8f996c54183663d8a954166dc16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a4cc13b87c17aad94cc24eadc16958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e51e312499fbd01f52090f89f64492f.png)
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名校
解题方法
6 . 已知正项数列
的前n项和为
,且
是4和
的等比中项,数列
,其前n项的和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc875ca919921e8f63a6fca648561b.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a8462c07c0143853c1bec52084360e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23016d1186ebefd8d67387f43f100229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e722d1cb06e597485399a64c75b14a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc875ca919921e8f63a6fca648561b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a8462c07c0143853c1bec52084360e.png)
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2020-07-20更新
|
638次组卷
|
2卷引用:四川省遂宁市船山区第二中学校2020届高三高考适应(二)考试数学(文)试卷
名校
7 . 已知数列
的前n项和为
,
,
且
(
),记
(
),若
对
恒成立,则
的最小值为__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd2607cae66b16e2a213d3b8f8c0c17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac2b0ad65019880b510c3b6e2a5939a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fc76e768f5d46cc3578fb0eed36898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2017-06-07更新
|
1970次组卷
|
7卷引用:四川省师范大学附属中学2017届高三下学期5月模拟考试数学(理)试卷
2011·四川广元·一模
8 . 已知函数
的定义域为N+,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1d50f8a35319bd0725f8fc5ee14990.png)
(1)求f(3)、f(4)的值;
(2)记
求证:数列
是等比数列;
(3)求(2)中数列
的通项公式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1d50f8a35319bd0725f8fc5ee14990.png)
(1)求f(3)、f(4)的值;
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0760d26552d695d0797f63ad831b35cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac6d7512f83e15bdcc3b8093470c1b07.png)
(3)求(2)中数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
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