1 . 已知等差数列
的公差
,
,且
,
,
成等比数列,数列
的前
项和为
,
,
设
.
(1)求数列
的通项公式;
(2)记数列
的前
项和为
,若
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.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/385275d29d8c8a7841eaeaa3dfab2cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd2e95b799a71622f5eb51151a11046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4de420ac1647be59283a966ef00b61.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
(2)记数列
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5141a5b907f5ff11bbd7cacbd7b5db3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3aa1b62569b302dc724dd2afe9d5c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
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2 . 已知数列
的前n项和为
,
,
,则
( )
![](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/d38228a6b9c040f171e6a497208e160f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0acca5aa6b2285d897a65c289c1b54ba.png)
A.414 | B.406 | C.403 | D.393 |
您最近一年使用:0次
2021-05-17更新
|
1818次组卷
|
8卷引用:河南省洛阳第一高级中学2021-2022学年高三上学期10月月考数学理科试题
河南省洛阳第一高级中学2021-2022学年高三上学期10月月考数学理科试题云南省昆明市2021届高三三模数学(文)试题(已下线)考点突破14 数列-备战2022年高考数学一轮复习培优提升精炼(新高考地区专用)(已下线)考点09 等差数列-2022年高考数学一轮复习小题多维练(新高考版)(已下线)4.2等差数列(B 能力培优练)-2021-2022学年高二数学同步双培优检测(苏教版2019选择性必修第一册)(已下线)4.2.3 等差数列的前n项和(1)-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)2022年高考考前20天终极冲刺攻略(二)【理科数学】安徽省合肥市肥东县综合高中2022-2023学年高三上学期期末考试数学试题
3 . 已知数列
的前
项和为
,
,且
(
),数列
满足
(
),
,其前11项和为88.
(1)求数列
和
的通项公式;
(2)令
,数列
的前
项和为
,若对任意正整数
,都有
,求
的值.
![](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/ed5a129d52170eaf59002c6f6cff72a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50a454957acee6310d508674aa8b300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d672f80ba626adecd8fe3297d2a1811.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323dcff134d062e43b210c71ab6c6232.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f1446ef730697d2abf9eeb8e9194ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13502d46b8563c54c09b29b20b3006a4.png)
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解题方法
4 . 若数列
的前
项和为
,
,则称数列
是数列
的“均值数列”.已知数列
是数列
的“均值数列”且通项公式为
,设数列
的前
项和为
,若
对一切
恒成立,则实数
的取值范围为( )
![](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/9c4867dfd2b1fa71e386275fe0fed234.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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a8100f98999e472945ab7050af50d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba57c83d526ac308d1461e80fcca9f36.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/b6bf1602d6658253b63c98c5a0279e75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-11-30更新
|
2156次组卷
|
13卷引用:河南省顶级名校2022-2023学年高三上学期1月阶段性检测文科数学试题
河南省顶级名校2022-2023学年高三上学期1月阶段性检测文科数学试题百校联盟2021届普通高中教育教学质量监测考试(全国新高考卷)数学试题(已下线)专题9 数列通项公式和前n项和-2021年高考冲刺之二轮专题精讲精析(已下线)“8+4+4”小题强化训练(32)数列的综合应用-2022届高考数学一轮复习(江苏等新高考地区专用)四川省南充市白塔中学2020-2021学年高一下学期第二次月考(6月)数学试题甘肃省会宁县第一中学2021-2022学年高二上学期期中考试数学(文)试题甘肃省会宁县第一中学2021-2022学年高二上学期期中考试数学(理)试题山东省烟台莱阳市第一中学2021-2022学年高二下学期开学摸底考试数学试题吉林省抚松县第一中学2021-2022学年高二下学期开学考试数学试题江苏省连云港市灌南高级中学2021-2022学年高二提优班上学期10月月考数学试题宁夏银川一中2023届高三上学期第三次月考数学(文)试题江苏省常州市第三中学2022-2023学年高二上学期期末数学试题江苏省南通西藏民族中学2022-2023学年高二上学期期中数学试题
5 . 已知数列
的前
项和为
,有
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34bb533ae12866a9b34b03e7ba157fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10c7f021444b4d80f8e0b43c16ae709.png)
(1)求数列
的通项公式;
(2)设
,求数列
的前
项和
.
![](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/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34bb533ae12866a9b34b03e7ba157fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10c7f021444b4d80f8e0b43c16ae709.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ababd343f2e5b9d32df8fb0d004737e.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
6 . 已知数列
为等差数列,其前
项和为
,若
(
且
),有以下结论:①
;②
;③
为递增数列;④
.则正确的结论的个数为
![](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/499b0047572a78f286cab0c569447c17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3b59acccb7bb76ced518b36426b7c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ca47be5a21ea60ebd04dd8945852d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd67cf18bd35149475d35f1c603ad59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a4e5816786e0db9b85a123f64bfb21.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
7 . 已知递增等比数列
,
,且
,
,
成等差数列,设数列
的前
项和为
,点
在抛物线
上.
(1)求数列
,
的通项公式;
(2)设
,数列
的前
项和为
,若
恒成立,求实数
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/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b3175ab6772cd611f9c42771a9467d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.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/455ccc1f06e91cb72efe6141afabf986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b67af73f586837594ab0db4b89baed.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ee176dd08e4b73f64a7cd0cabacbda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2019-10-30更新
|
903次组卷
|
6卷引用:河南省顶级名校2019-2020学年高二上学期10月阶段性检测数学(理)试题
河南省顶级名校2019-2020学年高二上学期10月阶段性检测数学(理)试题河南省顶级名校2019-2020学年高二上学期10月阶段性检测数学(文)试题辽宁省大连市庄河市高级中学2019-2020学年高二上学期期中数学试题湖北省随州市第一中学2019-2020学年高二上学期期中数学试题上海市虹口区2021-2022学年高二下学期期末在线测试数学试题(已下线)4.3数列的概念与性质(第1课时)(作业)(夯实基础+能力提升)-【教材配套课件+作业】2022-2023学年高二数学精品教学课件(沪教版2020选择性必修第一册)
名校
8 . 已知正项数列
的前
项和为
,首项
且
,则以下说法中正确的个数是( )
①
; ②当
为奇数时,
; ③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd16942d3767edbff6d3719ac9e2073.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29a47184404abb1570891ca6bec8b2.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1928c254cfada1f75a5cd1e34db5a63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48873417a7667f628e5c7052c96f416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd16942d3767edbff6d3719ac9e2073.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2017-05-12更新
|
1458次组卷
|
3卷引用:河南省2017届普通高中高三4月教学质量监测文科数学试题
9 . 正项数列
的前n项和Sn满足:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806a9750801f80c9a6832b6a8f22d318.png)
(1)求数列
的通项公式
;
(2)令
,数列{bn}的前n项和为Tn,证明:对于任意的n∈N*,都有Tn<
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806a9750801f80c9a6832b6a8f22d318.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2d6fd3f1811e95dab7db1311b8e3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3db9685af73cd5f3f2922c6237a4093.png)
您最近一年使用:0次
2016-12-12更新
|
12529次组卷
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31卷引用:河南省郑州市第一中学2019-2020学年高二上学期第2次测试数学试题
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名校
10 . 对于数列
,定义
为
的“优值”,现在已知某数列
的“优值”
,记数列
的前
项和为
,若
对任意的
恒成立,则实数
的取值范围是__________ .
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