1 . 已知无穷数列
中,
是以10为首项,以
为公差的等差数列,
是以
为首项,以
为公比的等比数列
,对一切正整数
,都有
.设数列
的前
项和为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20655342f9ace8b50a50f5eae6f37beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74eb8a7738402df52d4a97262b85ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142876945177d2d9621b6842e3d51f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0af2dc59419e7a5e2d093c3d0d42a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c453d55bd2873e4469273132c421e7b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.当![]() ![]() | B.当![]() ![]() |
C.当![]() ![]() | D.不存在![]() ![]() |
您最近一年使用:0次
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2卷引用:江苏省无锡市辅仁高级中学2024届高三下学期高考前适应性练习数学试题
名校
2 . 已知
是各项均为正整数的无穷递增数列,对于
,定义集合
,设
为集合
中的元素个数,若
时,规定
.
(1)若
,写出
及
的值;
(2)若数列
是等差数列,求数列
的通项公式;
(3)设集合
,求证:
且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542b4acf7b25b750fbe7205fd179b978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857369257ea1b23ef40ce7e3a0f058af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233427826eb2233641fc3a9805f6d206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1202d58cd3ad66e7b23f01024566705b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc57d8a4f67a040435d8b206d3254bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6510d0816033afa001c130342bb7cda.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4b5779873cb3f4366dbfdb983dec81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b6f99a33b14f53fb398a195aa2ec3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac648580405ecaa29e91d45738a08af7.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(3)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b54e4701d4cb8d0133ad2044a7e0f52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1479e28bf6a8cb64ec7df77cd295f99d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a6a3d1be93cf6d16ee6e0ce0497f46.png)
您最近一年使用:0次
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7卷引用:江苏省常州市华罗庚中学2024届高三下学期4月二模训练数学试卷
江苏省常州市华罗庚中学2024届高三下学期4月二模训练数学试卷广东省江门市开平市忠源纪念中学2024届高三下学期高考冲刺考试(一)数学试卷北京市朝阳区2024届高三上学期期末数学试题(已下线)专题1 集合新定义题(九省联考第19题模式)讲(已下线)2024年高考数学二轮复习测试卷(北京专用)(已下线)黄金卷01(2024新题型)(已下线)微考点4-1 新高考新试卷结构压轴题新定义数列试题分类汇编
3 . 记数列{
}的前n项和为
.已知
,___________.
从①
;②
;③
中选出一个能确定{
}的条件,
补充到上面横线处,并解答下面的问题.
(1)求{
}的通项公式:
(2)求数列{
}的前20项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8c4060c7a614a2f287e9fa8fd9f627.png)
从①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31148cf610ce41888d79538d1dafcb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/842b9a65ee998c6fa24ab651d90a9ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56b3d3b1e4633d3f7da681788346c3be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
补充到上面横线处,并解答下面的问题.
(1)求{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde4c9452a81d3adc834c4c9bc53b73e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2f710b0e6ccca316852bf3a94f68135.png)
您最近一年使用:0次
2022-05-11更新
|
1550次组卷
|
4卷引用:江苏省淮安市2022届高三下学期5月模拟数学试题
名校
解题方法
4 . 已知正项数列{
}中,
,
是其前n项和,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3732d13936fc1bfb0b5dee879c6be9b.png)
(1)求数列{
}的通项公式:
(2)已知数列{
}满足
,设数列{
}的前n项和为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9408e3483a9e54c6598e4ce7fb9211f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3732d13936fc1bfb0b5dee879c6be9b.png)
(1)求数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)已知数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773d99c89ee7204cfb47b844d417c077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57789e35017b999b7d519bdc26aad20e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8890769a19ffa101e95d672c4a343d1.png)
您最近一年使用:0次
2022-03-16更新
|
4797次组卷
|
13卷引用:江苏省南通市基地学校2022届高三第三次大联考数学试题
江苏省南通市基地学校2022届高三第三次大联考数学试题江苏省盐城中学2023届高三三模数学试题江苏省镇江市镇江第一中学2024届高三上学期12月阶段测试数学试题河南省漯河市实验高级中学2024届高三上学期1月阶段模拟测试数学试题(已下线)专题05 数列 第二讲 数列的求和(解密讲义)(已下线)专题05 数列 第三讲 数列与不等关系(分层练)(已下线)押全国卷(理科)第17题 解三角形与数列-备战2022年高考数学(理)临考题号押题(全国卷)(已下线)专题27 数列求和-2(已下线)6.4 求和方法(精讲)(已下线)第7讲 数列求和9种常见题型总结 (2)(已下线)拓展二:数列求和方法归纳(4)(已下线)数列 求和专题04数列求和(裂项求和)
解题方法
5 . 若数列
满足:存在实数
,使得
对任意
、
都成立,则称数列
为“
倍等阶差数列”.已知数列
为“
倍等阶差数列”.
(1)若
,
,
,求实数
的值;
(2)在(1)的条件下,设
.
①求数列
的通项公式;
②设数列
的前
项和为
,是否存在正整数
、
,且
,使得
、
、
成等比数列?若存在,求出
、
的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f886755029b84ea509e93eaf8bbc17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9dae8e6c9b93458f324f30538a3eb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa69dde104dcf963e67647e801e0149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)在(1)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5674b7bb417ca0697c719f608ec669a0.png)
①求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
②设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da72309d2507e2f5e5ed88d8cc08963.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/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5bbf2770cc61ba381e4a5ee5e1a26c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0833aa85a3389c7fc576b5f55359100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6996aacf881b439908670c81a749ddd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次
名校
解题方法
6 . 已知正项数列
的前n项和是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
,满足
(
为常数)
(1)记
,证明:数列
是等差数列;
(2)若
,
成等比数列,
①求数列
的通项公式;
②设
,其中
,且对任意的正整数k,
仍在数列
中,求q的所有值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d307ec71820b6536453fbdb5069da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9d8badc3547d1572c4959a91be96b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0846ab503f3451d5dd0cef4852cc0bd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62075e7a23f10f858055664d7c334b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8454b665ff46e01b0381be1dfdc77f29.png)
①求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6462a536b00334d30608bbb2cb1856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60736b127bc176442733dd0ae12ebcf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd80b4bfa68753c3173c003ae3a3113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
您最近一年使用:0次
解题方法
7 . 已知数列
满足
,
,
,
.
(1)若
,求
,
的值;
(2)证明:对任意正实数
,
成等差数列;
(3)若
(
),
,求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ecf69901899bba130968c7a091790d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f35fa103e2d4cfb68dc624dc45608d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8ccdaee0db880ba67c21a2eb3aa69a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df1038200f2d97a52c716aab6c3bcb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
(2)证明:对任意正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adfbe9461cc26c32a506a08be8793fe5.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32e2f964bb664deba92b0f9ea5f0d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a81b6f7856308f3a8badd3d39329c879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
您最近一年使用:0次
2020-07-15更新
|
316次组卷
|
4卷引用:江苏省徐州市2020届高三下学期考前模拟(四模)数学试题
江苏省徐州市2020届高三下学期考前模拟(四模)数学试题江苏省徐州市2020届高三(6月份)高考数学考前模拟试题(已下线)4.2.2 等差数列的通项公式(2)-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)考点31 等差数列的概念、通项公式与求和公式应用(考点专练)-备战2021年新高考数学一轮复习考点微专题
解题方法
8 . 设
是各项均为正数的等差数列,
,
是
和
的等比中项,
的前
项和为
,
.
(1)求
和
的通项公式;
(2)设数列
的通项公式
.
(i)求数列
的前
项和
;
(ii)求
.
![](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/6e0414c0b6fda7fee5eb71976e09da80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.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/f0df9231e0359cb84f1714a7a0199f69.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446bfd9d9c4168058f368c83263059db.png)
(i)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2def5aa62f497709e1bd8258583d62fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8318322c02eec4fc764f82a2f5d9119.png)
(ii)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef83c1651a259600984bc0946de37f85.png)
您最近一年使用:0次
2020-05-27更新
|
3093次组卷
|
6卷引用:江苏省南通市2023届高三三模数学模拟试题
江苏省南通市2023届高三三模数学模拟试题2020届天津市河西区高考一模数学试题天津市河西区2023届高三三模数学试题(已下线)2021年高考数学押题预测卷(天津卷)03(已下线)2021年新高考天津数学高考真题变式题16-20题(已下线)专题07 数列-2
9 . 已知数列
的前n项和为
,把满足条件![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772a40f2fe006d9f15c82eb3fd5b78a7.png)
的所有数列
构成的集合记为
.
(1)若数列
的通项为
,则
是否属于
?
(2)若数列
是等差数列,且
,求
的取值范围;
(3)若数列
的各项均为正数,且
,数列
中是否存在无穷多项依次成等差数列,若存在,给出一个数列
的通项;若不存在,说明理由.
![](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/772a40f2fe006d9f15c82eb3fd5b78a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2889dd3096379db5dfdd51305bdbb743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78a26e3eeac053424c52ab90f6a3490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab502f4746976616a116def2ad9f860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a64e8b2d22c198754636228638bbd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c331999c6070ea778ce3a0b6e967b16f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
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解题方法
10 . 已知等差数列
和等比数列
的各项均为整数,它们的前
项和分别为
,且
,
.
(1)求数列
,
的通项公式;
(2)求
;
(3)是否存在正整数
,使得
恰好是数列
或
中的项?若存在,求出所有满足条件的
的值;若不存在,说明理由.
![](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/478421b81927e435cbcf5acafa89efd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38795ba10dc132a5c881c55662c59481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c965ec01fec42742a13150bd58b1836.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168709cd9594c2e8d03cef86ea024b8c.png)
(3)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df537f5b6e1c39e76ccd6fb4a403382e.png)
![](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/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-04-23更新
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2561次组卷
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