1 . 已知数列
满足:
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6702523bf2d7ec427db71949995b3158.png)
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14d900f61c59b88ecd27d743789d272.png)
,且数列
是单调递增数列,则( ).
![](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/6702523bf2d7ec427db71949995b3158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5f58ad9080f2ca1a38fa92ac959c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14d900f61c59b88ecd27d743789d272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5f58ad9080f2ca1a38fa92ac959c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
A.数列![]() |
B.数列![]() ![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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2 . 在①数列
的前n项和
;②
且
,
,这两个条件中任选一个,补充在下面的问题中,并求解:
(1)已知数列
满足__________,求
的通项公式;
(2)已知正项等比数列
满足
,
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5886e031a95a8d52c9306e6b1c518abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967ea5113f089bab2c7b05d5bb532334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced4e381e8c3336848b8c436dbc584f3.png)
(1)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)已知正项等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5133dd584bd9fcd9f1dc02b0de0471d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2501edb1599bc75cc97cf547758f0dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c184ea9cff0b7572138ea7b36a34e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2023-01-18更新
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4卷引用:重庆市第十一中学校2023届高三上学期12月质量监测数学试题
重庆市第十一中学校2023届高三上学期12月质量监测数学试题(已下线)江苏省七市2022届高三下学期第二次调研考试数学试题变式题17-22宁夏六盘山高级中学2023届高三下学期开学测试数学(理)试题(已下线)专题3 等差数列的判断(证明)方法 微点2 通项公式法、前n项和公式法
名校
3 . 在2022年北京冬残奥会闭幕式上,出现了天干地支时辰钟表盘.天干地支纪法源于中国,不仅用于纪时纪日,也可用于纪年.天干地支具体分为十天干与十二地支,十天干即甲、乙、丙、丁、戊、己、庚、辛、壬、癸;十二地支即子、丑、寅、卯、辰、巳、午、未、申、酉、戌、亥,天干地支纪年法是按顺序以一个天干和一个地支相配,排列起来,天干在前,地支在后,天干由“甲”起,地支由“子”起,例如,第一年为“甲子”,第二年为“乙丑”,第三年为“丙寅”,
,以此类推,排列到“癸酉”后,天干回到“甲”重新开始,即“甲戌”,“乙亥”,然后地支回到“子”重新开始,即“丙子”.某校创立于1933年(癸酉),以此类推即将迎来的九十周年校庆的2023年为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
A.壬寅 | B.壬卯 | C.癸寅 | D.癸卯 |
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4 . 下列关于数列的说法正确的有( ),其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
A.若数列![]() ![]() |
B.若数列![]() ![]() |
C.若函数![]() ![]() ![]() |
D.若数列![]() ![]() ![]() |
您最近一年使用:0次
5 . 已知数列
满足:函数
的图象经过点
,设数列
的前n项和为
,则下列命题中的真命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6dcba920904a03e3f950e962cc8c7ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee6881a170f6ef9ed5c133b95c2f448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a82e64e335640ed8fc0484866751a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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2022-09-23更新
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2卷引用:重庆市南开中学校2023届高三上学期9月月考数学试题
6 . 已知数列
,满足
,
;
(1)求
的通项公式;
(2)若
,求
的前2n项和
.
![](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/23e5a9566bb42dca9030be3915456c00.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe00db0e3ba6967ed0db09c5338368c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ef8539a7a09303a95b4e79fb9949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
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2022-04-08更新
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2卷引用:重庆市缙云教育联盟2022届高三第二次诊断性检测数学试题
名校
解题方法
7 . 已知等比数列
满足
,公比
,则( )
![](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/535fd9605b90ac7f0fed6025be9f851f.png)
A.数列![]() | B.数列![]() |
C.数列![]() | D.数列![]() |
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4卷引用:重庆市天星桥中学2022届高三上学期学业质量调研抽测(一)数学试题
名校
解题方法
8 . 已知数列
的前
项和为
,满足
,
,
.
(1)记
,求
的通项公式;
(2)记
,求
的前63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/7c8521fd4bcee13cea7d0f2f7055d6c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4cecbdebeb5d12fbe1d54b81cc05a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2976c2bd0da7a801a024265e958e8cf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a5911d00bfb3e4d92ea42a02fee659.png)
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2卷引用:重庆实验外国语学校2022届高三上学期一诊模拟数学试题