1 . 设等差数列
的前
项和为
,若
,
,则
的最大值为__________ .
![](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/8bc0a194c7d91758d3d6a4fc35961fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efe4c56130c9cfb727793aba760a4981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
您最近一年使用:0次
2016-11-30更新
|
2274次组卷
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8卷引用:2008年普通高等学校招生全国统一考试理科数学(四川卷)
2008年普通高等学校招生全国统一考试理科数学(四川卷)2008年普通高等学校招生考试数学(理)试题(四川卷)(已下线)安 徽 省2010年高三教学质量检测试卷(三)数学试题(理科)(已下线)2011届江苏省南京六中高三考前模拟考试数学(已下线)2011年江西省抚州市教研室高二上学期期末数学理卷(A)2015-2016学年湖南省常德石门一中高二上期中数学试卷2016-2017学年安徽六安一中高二理上段测二数学试卷人教A版 成长计划 必修5 第二章数列 应用·拓展·综合训练
名校
解题方法
2 . 已知
为等差数列,其前n项和
,若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
______
![](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/a8a0eecb5b800fce9ae10aed86ffee62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6cae27fb7b5cdf62eb870ced5a2e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
您最近一年使用:0次
2020-02-11更新
|
316次组卷
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6卷引用:四川省隆昌市第七中学2022-2023学年高三上学期10月考试文科数学试题
3 . 记
为等差数列
的前
项和,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8448a350086c5a6b60a3235bb1373246.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3f1f8813adcedd56b471961b2ad6a6.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/fc9efeb4455e30293d412938eeea85d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10676f89f1dca5848754765e20243fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8448a350086c5a6b60a3235bb1373246.png)
您最近一年使用:0次
2019-10-23更新
|
511次组卷
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4卷引用:四川天府名校2019-2020学年高三上学期教学第一轮联合质量测评理科数学试题
4 . 用
表示正整数
所有因数中最大的那个奇数,例如:
的因数有
,
,
,则
,
的因数有
,
,
,
,则
.计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec2957cb7aa9538fcf375d6b1998d01.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef5f56f08fd326e87c0b607a5c89ba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ee31cc027ba6ae0ad5f564ed1e0b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f83abb38950a79d3c10da77b7e2798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec2957cb7aa9538fcf375d6b1998d01.png)
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5 . 有两个等差数列
及
由这两个等差数列的公共项按从小到大的顺序组成一个新数列,则这个新数列的各项之和为________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995e28479d34d8213abfdb8e5860b48a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d818374c237ddd87fbbb17d83ed52a50.png)
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2016-12-03更新
|
800次组卷
|
10卷引用:2015届四川省雅安中学高三开学考试理科数学试卷
名校
6 . 已知
为数列
的前
项和,且
,若
,
,
给定四个命题①
;②
;③
;④
.
则上述四个命题中真命题的序号为____ .
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d3ab802a25061e9243b00c6b3e4aad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e367918925c6dc91bc754ecb5523df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0356c3e21676842219bb4c5cff5fb56b.png)
给定四个命题①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f922d56b4d75a178b16dbe8e958b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f787f1f043836137dec41841a51708f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e84f5fc1bcdeb2dd089554ce6fdd532f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed0065bc865d3ad48f0a62999ae17dc1.png)
则上述四个命题中真命题的序号为
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2018-02-12更新
|
920次组卷
|
3卷引用:四川省成都市龙泉驿区第一中学校2019届高三12月月考数学(理)试题
7 . 若等差数列
的前n项和为
,且
,则使得
时n的值为______ .
![](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/84a1447f2d5953e6a45cfc2819eb3c23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547343b443dba2d77da457f77c21b204.png)
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8 . 设
是公差不为0的等差数列
的前
项和,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee98923258c6b7d05cccdf927576968b.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b69991e6841f6c4c9558749f95d82a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee98923258c6b7d05cccdf927576968b.png)
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2020-01-07更新
|
329次组卷
|
2卷引用:四川省眉山市仁寿县2019-2020学年高三上学期期中数学(理)试题
名校
解题方法
9 . 已知等差数列
的前n项和为
,
,则使得
成立的最大的自然数
为________ .
![](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/ab3fc09958f465149a5ec563fb8888c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49763402b2f2023f0ba64c37924267d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2018-04-23更新
|
692次组卷
|
2卷引用:四川省资阳市2018届高三4月模拟考试(三诊)数学(文)试题
名校
解题方法
10 . 若等差数列
的前
项和为
,则
.由类比推理可得:在等比数列
中,若其前
项的积为
,则
=________ .
![](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/46fdbb411d9943abe66011aa5dfc0f7c.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/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b679ed1a38a491ac0efa5beee27c2c75.png)
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2021-09-11更新
|
196次组卷
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4卷引用:四川省内江市第六中学2021-2022学年高三上学期第二次(9月)月考理科数学试卷