19-20高二下·上海浦东新·期末
名校
1 . 已知集合
,其中
,
,
,
表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059a6c5a965c335b8da05e697da2c7c2.png)
中所有不同值的个数.
(1)设集合
,
,分别求
,
;
(2)若集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2c8cdc0ae739e1b23ba9a2102dc6fe.png)
,证:
;
(3)
是否存在最小值?若存在,求出这个最小值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d35d7c81c3ade827a43c4ab0fac265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147a9ae90baacb72de0596be4f69bc2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef835c9ad2636a9662fb6c99e3abc78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9153fb853cd99beec9e600a4eaf73fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f287eeb047884b44460a1c8e73726d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059a6c5a965c335b8da05e697da2c7c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/349e6582f21958073a3eb0f1fe70eb86.png)
(1)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca112f43de2fa7e39011fe5c90720ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b831331392b487ce85fa0ac900dba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c018c9e6ed11bfb122fcf174551b9a97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead4078398b07739ac40fc10ee8f37eb.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2c8cdc0ae739e1b23ba9a2102dc6fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9673d71028e49069884d043015d1d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b0190b02ea4b1ce5dfd703651d23aa3.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f287eeb047884b44460a1c8e73726d5.png)
您最近一年使用:0次
解题方法
2 . 已知各项均为正数的两个数列
和
满足:
,
,
(1)设
,
,求证:数列
是等差数列;
(2)设
,
,且
是等比数列,求
和
的值.
![](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/b5c3a2fd3a8d8473b7576b4060c11cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/410332f96631d0fde958bba2357b4ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ccfd5f9d8afdacef128bd713afdf38.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66480b05594886a986d035b0f038bea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://img.xkw.com/dksih/QBM/2020/8/19/2531390791180288/2532618430078976/STEM/482468d531554381908077f8f69d600d.png?resizew=12)
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3 . 设数列
的前
项和为
,且
.
(1)求证:数列
为等比数列;
(2)设数列
的前
项和为
,求证:
为定值;
(3)判断数列
中是否存在三项成等差数列,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/3ec5876debe2d19fc86125efcf9003d0.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea49f8a2b98b542b1ebb2ac813346c90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b87635913b4f90a784edd6ef79f2aec.png)
(3)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85849759030b70f4645bc3fdd2721e22.png)
您最近一年使用:0次
2017-09-14更新
|
1951次组卷
|
7卷引用:《2018届优等生百日闯关系列》【江苏版】专题二 第六关 以新定义数列为背景的解答题
(已下线)《2018届优等生百日闯关系列》【江苏版】专题二 第六关 以新定义数列为背景的解答题江苏省海安县2018届高三上学期第一次学业质量测试数学试题江苏省徐州市第三中学2017~2018学年度高三第一学期月考(理科)数学试卷2020届江苏省南通市如皋中学高三创新班下学期4月模拟考试数学试题江苏省盐城市第一中学2020届高三下学期第一次调研考试数学试题甘肃省兰州市第一中学2020届高三冲刺模拟考试(三)数学(文)试题(已下线)第02章+章末复习课(重点练)-2020-2021学年高二数学十分钟同步课堂专练(人教A版必修5)
4 . 设等差数列
的公差d不为0,
.若
是
与
的等比中项,求项数k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6befb15639c677e71fa1f73bcc683ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39773a450e3c30c72ead226d84e54563.png)
您最近一年使用:0次
2022-09-07更新
|
231次组卷
|
3卷引用:4.3.1 等比数列的概念(第2课时)(分层作业)-【上好课】2022-2023学年高二数学同步备课系列(人教A版2019选择性必修第二册)
(已下线)4.3.1 等比数列的概念(第2课时)(分层作业)-【上好课】2022-2023学年高二数学同步备课系列(人教A版2019选择性必修第二册)(已下线)4.3.1.1 等比数列的概念(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)沪教版(2020) 选修第一册 精准辅导 第4章 4.2(1)等比数列及其通项公式
11-12高三·江西吉安·阶段练习
名校
5 . 已知各项均为整数的数列
满足
,
,前6项依次成等差数列, 从第5项起依次成等比数列.
(1)求数列
的通项公式;
(2)求出所有的正整数m ,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3af4204cbd59c0bc15f5d83b240a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/674b8ec980dee2fcc9f6d2682cb8e358.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求出所有的正整数m ,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088d98f71f331d45f7543a5dc881df6b.png)
您最近一年使用:0次
2016-12-01更新
|
2183次组卷
|
12卷引用:专题19数列求和、数列的综合应用-2022年高三毕业班数学常考点归纳与变式演练(文理通用)
(已下线)专题19数列求和、数列的综合应用-2022年高三毕业班数学常考点归纳与变式演练(文理通用)(已下线)2012届江西省吉水中学高三周考理科数学2015届江苏省盐城市时杨中学高三12月月考调研数学试卷2015届江苏省宿迁市剑桥国际学校高三上学期期中考试数学试卷江苏省南京市金陵中学2018届高三上学期10月考数学试卷湖南师大附中2020-2021学年高三上学期10月第二次月考数学试题湖南师大附中2021届高三(上)月考数学试题(二)湖南师范大学附属中学2020-2021学年高三上学期第二次月考数学试题湖北省荆州市石首一中2020-2021学年高三上学期11月月考数学试题福建省龙岩市上杭县才溪中学2023届高三上学期11月检测数学试题江苏省南通市如东县2022-2023学年高二上学期12月段考数学试题江苏省南京航空航天大学苏州附属中学2023-2024学年高二上学期10月月考数学试题
真题
名校
6 . 本题共3个小题,第1小题满分3分,第2小题满分6分,第3小题满分9分.
已知数列
满足
.
(1)若
,求
的取值范围;
(2)若
是公比为
等比数列,
,
求
的取值范围;
(3)若
成等差数列,且
,求正整数
的最大值,以及
取最大值时相应数列
的公差.
已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065054f4e163585d630aa42cb6323a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e1f81d005224d16653bd7f2ac046c3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ab2b73cc3df0c7af68074add68c1ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065054f4e163585d630aa42cb6323a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f3958fc40c8617e51528a12635941f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00cc6f2adc4e04a52ff388c893e3ec5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9be1a58b1c30251435d2e8d6e58444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b0a31eafdc6483cc87d6898260cd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9be1a58b1c30251435d2e8d6e58444.png)
您最近一年使用:0次
2016-12-03更新
|
2805次组卷
|
8卷引用:考向14 等差数列-备战2022年高考数学一轮复习考点微专题(上海专用)
(已下线)考向14 等差数列-备战2022年高考数学一轮复习考点微专题(上海专用)(已下线)考向15 等比数列-备战2022年高考数学一轮复习考点微专题(上海专用)(已下线)第4章《数列》 培优测试卷(二)-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)重组卷01(已下线)专题21 数列解答题(理科)-22014年全国普通高等学校招生统一考试理科数学(上海卷)上海市复兴高级中学2018-2019学年高一下学期期末数学试题上海市青浦高级中学2021届高三高考数学综合练习试题(一)
7 . 若数列{an}是的递增等差数列,其中的a3=5,且a1,a2,a5成等比数列,
(1)求{an}的通项公式;
(2)设bn=
,求数列{bn}的前项的和Tn.
(3)是否存在自然数m,使得
<Tn<
对一切n∈N*恒成立?若存在,求出m的值;
若不存在,说明理由.
(1)求{an}的通项公式;
(2)设bn=
![](https://img.xkw.com/dksih/QBM/2017/10/12/1793648458670080/1793732976902144/STEM/62e5320092b64da592270e4b50839e37.png?resizew=123)
(3)是否存在自然数m,使得
![](https://img.xkw.com/dksih/QBM/2017/10/12/1793648458670080/1793732976902144/STEM/68110197a8b34a4e95d99b7604204882.png?resizew=37)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67bd9b440abf3c3741e7ce4d017589ab.png)
若不存在,说明理由.
您最近一年使用:0次
2017-10-12更新
|
2177次组卷
|
3卷引用:专题07 数列与不等式相结合问题(第二篇)-备战2020年高考数学大题精做之解答题题型全覆盖
(已下线)专题07 数列与不等式相结合问题(第二篇)-备战2020年高考数学大题精做之解答题题型全覆盖广东省揭阳市普宁华美实验学校2017-2018学年高二上学期第一次月考数学(理)试题广东省梅州市兴宁市第一中学2019-2020学年高三上学期期末数学(文)试题
解题方法
8 . 已知等差数列
的首项为
,公差为
,等比数列
的首项为
,公比为
,其中
,且
.
(1)求证:
,并由
推导
的值;
(2)若数列
共有
项,前
项的和为
,其后的
项的和为
,再其后的
项的和为
,求
的比值.
(3)若数列
的前
项,前
项、前
项的和分别为
,试用含字母
的式子来表示
(即
,且不含字母
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ea79e5b52c82c9b5bc188e150ecd8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/543150ec61b3177fbb45b7e1d9800765.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663408ffd10ad082002513bd472118c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9b4d7a50cac0f712c6bb644f5e07e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f41be870e84c819362787849770519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9a672337c7a5d00e55581bb265aba0.png)
(3)若数列
![](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/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f41be870e84c819362787849770519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7cac25e2a2ca07a5b406de7d6c1752b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d307b3c4da63535e665ce0a17712eb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4001ae6c447850b139a0206d28e02516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
您最近一年使用:0次
2020-01-14更新
|
489次组卷
|
3卷引用:专题7 等比数列的性质 微点2 等比数列前n项和的性质
(已下线)专题7 等比数列的性质 微点2 等比数列前n项和的性质上海市北虹、上理工附中、同二、光明、六十、卢高、东昌等七校2016-2017学年高三上学期12月月考数学试题上海市七校2017届高三上学期12月联考数学试题
名校
9 . 平面直角坐标系中,
为坐标原点,射线
与
轴正半轴重合,射线
在第一象限,且与
轴正半轴的夹角为
,在
上有点列
,在
上有点
,已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/743a804e62f13bfb5f8d2468b8ad34fa.png)
(1)求点
和
的坐标;
(2)求
的坐标;
(3)求
面积的最大值,并求出此时的
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62bd9976b37f0e5919155e5a8c50d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98714eea0de264fed373d73bd93d23c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f138be24bfcc4c58bf8b43244315dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/743a804e62f13bfb5f8d2468b8ad34fa.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b65a3cabd534738ebb98823e5c203c5.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9079438b81a652c5deaf0641d249423a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2018·上海浦东新·三模
名校
10 . 设
,若无穷数列
满足:对所有整数
,都成立
,则称
“
-折叠数列”.
(1)求所有的实数
,使得通项公式为
的数列
是
-折叠数列;
(2)给定常数
,是否存在数列
,使得对所有
,
都是
-折叠数列,且
的各项中恰有
个不同的值?证明你的结论;
(3)设递增数列
满足
.已知如果对所有
,
都是
-折叠数列,则
的各项中至多只有
个不同的值,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a949b947e9961d4d68bfeb4e24ef40f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98251cd3c3e36825493a3f83b0ac9d6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9cdd87bcc6088bea7dc1f24387b0502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)求所有的实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6290fabfee064ca7296364c2011c16ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
(2)给定常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/270672a95f2a5349bc440c53b5dd4a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a949b947e9961d4d68bfeb4e24ef40f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dbc76e88046029a006e48b6b58823d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbf39f278f6fcfbd30de4a1ad65e5bf.png)
(3)设递增数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4818b2c2d51316638cf39039d6cb4d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f74927b7593fd0b4f218b3806e3025dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a949b947e9961d4d68bfeb4e24ef40f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b037996f28c91402cff9c883c99a8e6.png)
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