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1 . 【江苏省南京市2018届高三第三次模拟考试数学试题】若数列
满足:对于任意
均为数列
中的项,则称数列
为“
数列”.
(1)若数列
的前
项和
,求证:数列
为“
数列”;
(2)若公差为
的等差数列
为“
数列”,求
的取值范围;
(3)若数列
为“
数列”,
,且对于任意
,均有
,求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12904ba93668414fbd4196c65b380e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e439cf2ba548f2bf9b74993d37788a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)若公差为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381576e698a46df8c497e6b5f8346ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb0252535a8504bc51bfe2a1b32a512.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75175d13d8d9ec79257e62cc1d675eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
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2018-05-17更新
|
947次组卷
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3卷引用:上海市第二中学2017-2018学年高一下学期5月月考数学试题
上海市第二中学2017-2018学年高一下学期5月月考数学试题【全国市级联考】江苏省南京市2018届高三第三次模拟考试数学试题(已下线)专题20 与数列有关的恒成立问题-2018年高考数学(理)母题题源系列(江苏专版)
名校
2 . 已知等比数列
的首项是1,公比为3,等差数列
的首项是
,公差为1,把
中的各项按如下规则依次插入
的每相邻两项之间,构成新数列
:
,
,
,
,
,
,
,
,
,
,…,即在
和
两项之间依次插入
中
个项,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ed0224c4aa502c52317eb04b0e7aad.png)
__________ .(用数字作答)
![](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/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57483e04fd1840c87ac5325157149877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a548938d87c80ac47910607d3857007f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f6714682274c31a328bf796e235900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64fcc69dc28bc11b22f5c9bec9e2aa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.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/d7ed0224c4aa502c52317eb04b0e7aad.png)
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2018-05-10更新
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2卷引用:江苏省无锡市滨湖区梅村高级中学2020-2021学年高二上学期10月月考数学试题
名校
解题方法
3 . 已知正项数列
是公差为2的等差数列,且
成等比数列.
(1)求数列
的通项公式;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bdbde4eb7e4d4033bb9053b6c806e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2b620c000a4b62e8cf2622203d3b0e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](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)
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2018-05-08更新
|
1221次组卷
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5卷引用:安徽省安庆市第九中学2024届高三上学期12月月考数学试题
名校
4 . 如图:假设三角形数列中的第
行的第二个数为
(
,
)
(1)归纳出
与
的关系式并求出
的通项公式;
(2)设
求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0389872378017a56197512bb135f9e.png)
… … … …
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)归纳出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1007c236bcfaa220264c81eadf50efa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0389872378017a56197512bb135f9e.png)
1 ……第一行
2 2 ……第一行
3 4 3 ……第一行
4 7 7 4 ……第一行
5 11 14 11 5 ……第一行
… … … …
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5 . 已知等差数列
.
(1)求数列
的通项公式;
(2)记数列
的前
项和为
,求
;
(3)是否存在正整数
,使得
仍为数列
中的项,若存在,求出所有满足的正整数
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/690b52ea6ca69f2d11f49d964bac5bba.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0b789e9e9a0fb1114ac37272c53fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7964768c0433e28587bc2fe37cd81fbf.png)
(3)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403815df49651222e3a462b706ded129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2018-05-02更新
|
800次组卷
|
3卷引用:江苏省扬州市邗江中学2020-2021学年高二上学期第一次月考数学试题
名校
6 . 若正项数列
的前
项和为
,首项
,
点在曲线
上.
(1)求数列
的通项公式
;
(2)设
,
表示数列
的前
项和,若
恒成立,求
及实数
的取值范围.
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897250fd6f7c4850c25b50935bb0b107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18edcb3452fc9e1b32cdc591d82625ea.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d005409790b3192705a181b2c8e7dfed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.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/58a9f0ab499a13fd7dc758a2c5ac54a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2018-04-23更新
|
1160次组卷
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2卷引用:吉林省舒兰市第一高级中学校2018-2019学年高二下学期第一次月考数学(文)试题
名校
解题方法
7 . 已知数列
为等差数列,数列
为等比数列,满足
(1)求数列
通项公式;
(2)令
,求数列
的前
项和
.
![](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/a527d4fd3a546f32f987d94937b32e99.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236fce2fe83bbc5d0a200ace4952fe07.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9221c0c92a526f65533cdc5400767af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2018-04-17更新
|
3399次组卷
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9卷引用:贵州省三都民族中学2017-2018学年高二第二学期第一次月考数学(理)试题
贵州省三都民族中学2017-2018学年高二第二学期第一次月考数学(理)试题【校级联考】安徽省阜阳三中2018-2019学年高二上学期第一次调研考试数学(文)试题安徽省阜阳三中2018-2019学年高二上学期第一次调研考试数学(理)试题陕西省渭南市大荔县2018-2019学年高二下学期转段考试数学(文)试题陕西省渭南市大荔县2018-2019学年高二下学期转段考试数学(理)试题天津市杨柳青第一中学2019-2020学年高二下学期3月停课不停学阶段检测数学试题【全国百强校】辽宁省沈阳市东北育才学校2019届高三上学期第三次模拟数学(理)试题湖北省武汉市水果湖高级中学2019-2020学年高一下学期线上期中考试数学试题黑龙江省哈尔滨师范大学青冈实验中学校2019-2020学期高三上学期开学考试(8月)数学(文)试题
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8 . 已知数列
的前
项和为
(
),且满足
,若对
恒成立,则首项
的取值范围是__________ .
![](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/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c905883ac4f2d3609998f76df8b66e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eedbd168618a95a85e0a4598ad914284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
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2018-04-12更新
|
2328次组卷
|
6卷引用:吉林省长春市农安县农安高级中学2022-2023学年高二下学期4月月考数学试题
9 . 在等差数列{
}中,
=1,前n项和为
,有2S=
(n
),
(1)求
;
(2)若
=
,当n<19, n
时,试比较
…
和
…
的大小
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abc35db70903a914dbe0b6c07e9b341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff6d85a34308b49955202cefe3c78c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/227f8d6f935a4e9fbe2098e2f0d16c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e135c621652113201fcd8102aa4c3f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0d3ea3cd011ff255950d54d30d5ea7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4408cd06f655faa6981a866cdd30c625.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56c50cf9d757e5ea8e7009a339a81af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d3ddd240a8127e9c11e5d8c4929a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0d3ea3cd011ff255950d54d30d5ea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b5bf43f270489ff9c228a14d59421e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56c50cf9d757e5ea8e7009a339a81af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b5bf43f270489ff9c228a14d59421e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7db7647f448cca4308cbda6c37d20f9.png)
您最近一年使用:0次
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10 . 设
是公差不为零的等差数列,满足
数列
的通项公式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0617a80f5254af0beac2481c1b5697e.png)
(1)求数列
的通项公式;
(2)将数列
,
中的公共项按从小到大的顺序构成数列
,请直接写出数列
的通项公式;
(3)记
,是否存在正整数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
,使得
成等差数列?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d923a8149e1066695eccc4648aca88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0617a80f5254af0beac2481c1b5697e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)将数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4fdaa06b10cff919bf67c8e48e099c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ef8539a7a09303a95b4e79fb9949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ef8539a7a09303a95b4e79fb9949fc.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63bd678ef31d85a68ca3a3b854044bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00dbeb9a83676ce1a65978608ef2354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd9bdc4837cb3f89cdbfb9cde603733.png)
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2018-04-06更新
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2卷引用:江苏省溧中、省扬中、镇江一中、江都中学、句容中学2017-2018学年高一下学期3月联考数学试题