名校
1 . 若不等式
对于任意正整数n恒成立,则实数a的取值范围是_______________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87be077fcf30d51a985cb38c66f9ef87.png)
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2018-12-24更新
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3卷引用:广西百校联盟暨桂林市2021~2022学年高二12月数学质检试题
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2 . 在前n项和为
的等差数列
中,
,
,则数列
的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
_________ .
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f7519e1b1dd927bc634eedafc88820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2卷引用:广西崇左高级中学2020-2021学年高二上学期期末模拟数学(理)试题
3 . 已知公差不为0的等差数列
,正整数
,
,
,
满足
,则
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bfdb1a27a61169fa2f6d275c968d6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d5abe40c3ca643741f386f2646af8cf.png)
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4 . 在数列
中,
,
,则该数列的通项公式
=__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c7004dd54bb0a0d482c2dee3e35b1c.png)
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572449613742080/1572449619623936/STEM/030ed2dd6057445e9796655c9057e4d7.png?resizew=19)
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2016-12-04更新
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585次组卷
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5卷引用:广西南宁市第三中学2020-2021学年高一下学期第一次月考数学试题
广西南宁市第三中学2020-2021学年高一下学期第一次月考数学试题2016届福建省三明一中高三上第二次月考理科数学试卷(已下线)《2018届优生-百日闯关系列》数学专题 二 第五关 以数列求和或者通项公式为背景的填空题(已下线)拓展一:数列递推与通项公式归类(1)(已下线)专题08 求数列通项17种常见考法归类(2)
5 . 已知命题
:
中,角A,B,C成等差数列,则
;命题
:若不等式
的解集为
,其中
,则不等式
的解集为
.在命题①
②
③
④
中,真命题是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13285b89cefa3dbe140ee32bff9b5621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5f28031b036e4a37be931d5ff28368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02302cb85d5a04ac2e3133455f537b09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c72656c882b2830eeb8053ec18c0088f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9c72e257ee36ecd27b7816b84a8202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16645d012f7a86474f7e4e89a5471df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e48ebdd742cb5d310c21a384d599bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6777065ed14d76944be5cb45d9e2c76.png)
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解题方法
6 . 设等差数列
的前
项和为
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.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/a8a0eecb5b800fce9ae10aed86ffee62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f402399ab8db3466668f781b77155ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
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2020-07-25更新
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2卷引用:广西浦北中学2020-2021学年高一3月月考数学试题