名校
1 . 已知数列
的前n项和为
,
,
.
(1)求证
为等比数列;
(2)求证:
.
![](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/3d6951544682f2ca7b60da7a0e1bc0ca.png)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31f8e73f57902d2fc5855afbf7b2437e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105de1b20942840a12712c6795a05e1b.png)
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2020-12-08更新
|
1366次组卷
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4卷引用:陕西省咸阳市高新一中2020-2021学年高三上学期第四次考试理科数学试题(A卷)
陕西省咸阳市高新一中2020-2021学年高三上学期第四次考试理科数学试题(A卷)湖南省衡阳市第八中学2023-2024学年高三上学期第二次阶段性考试数学试题(已下线)专题16 数列放缩证明不等式必刷100题-【千题百练】2022年新高考数学高频考点+题型专项千题百练(新高考适用)四川省成都市第七中学2023-2024学年高二下学期3月阶段性检测数学试题
2 . 数列
满足
,
,
,
.
(1)求
,
及
(用
表示);
(2)设
,求证:
;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbfe9cbf54b82384301dbbf69289c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502499c83471a18306bc0e021a5017a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21659513ebcf7a1be6f3f7d8f733c733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.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/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245634836d83f65fc1cc073a8d758aa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b007ca14c228e163ee280a921c4df0.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119070b66392cbc0e9c70b7785a74b8f.png)
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3 . 已知数列
满足
,
,
(1)求
;
(2)若数列
满足
,
,求证:
.
![](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/954479fb7a5d2f9fa3ed75a733d45785.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd705b936f0417aa140f274e195f56b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdb3a8bacf7664edc033997ba2229f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d74b373135978716d3327f38e751d468.png)
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2020-07-16更新
|
1092次组卷
|
3卷引用:浙江省宁波市镇海中学2020届高三下学期高考适应性考试数学试题
浙江省宁波市镇海中学2020届高三下学期高考适应性考试数学试题湖南师范大学附属中学2020-2021学年高二下学期第二次月考数学试题(已下线)专题16 数列放缩证明不等式必刷100题-【千题百练】2022年新高考数学高频考点+题型专项千题百练(新高考适用)
解题方法
4 .
.
(1)求
的最大值m的值;
(2)已知
,
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15a46d01f5d1d0ab2bd7308fd720d47.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab04de6651256f6281e9f4c1dc3c7955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d65a03ddc26e2597681201911b17261.png)
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2020-05-14更新
|
120次组卷
|
2卷引用:2020届湖南省娄底市高三高考仿真模拟理科数学试题
5 . 已知各项均为正数的数列
满足:
,
.
(1)求数列
的通项公式;
(2)若数列
满足
,
,求
;
(3)若数列
满足
,
,求证:
.
![](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/7f2547c1b80d4e4b1bff13a91591a7b2.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8107120e073023ad75e7eaaddb1636e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32358e5011f302a215b28b056d5700c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f037af5d248d971600b9b61abf197de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49473b0989f7b5dc236d4f810ad3c6e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17aa6574ca79d0884694c1475f298db.png)
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名校
解题方法
6 . 已知函数
.
(1)求不等式
的解集;
(2)设函数
的最小值为m,当a,b,
,且
时,求
的最大值.
![](https://img.xkw.com/dksih/QBM/2020/3/9/2415737295060992/2416062545199104/STEM/34c49c58bd714133920bb56a98d7f14a.png?resizew=177)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4509817be39bef4bcde115996ee39e8.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ac49619543ace1f24754240fcf6cb09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86be2de99fbf7f99cd54ab399146b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e644e75022aa5372e81410c95f393b10.png)
您最近一年使用:0次
2020-03-09更新
|
991次组卷
|
15卷引用:2020届湖南省长沙市长郡中学高三下学期4月第三次适应性考试数学(文)试题
2020届湖南省长沙市长郡中学高三下学期4月第三次适应性考试数学(文)试题【省级联考】东北三省四市2019届高三第一次模拟数学(文)试题【市级联考】东北三省四市2019届高三第一次模拟数学(理)试题1【市级联考】辽宁省大连市2019届高三第一次模拟考试数学(理)试题【市级联考】东北三省四市2019届高三第一次模拟数学(理)试题2【市级联考】东北三省四市2019届高三第一次模拟数学(文)试题【市级联考】吉林省长春市普通高中2019届高三质量检测(三)数学(理)试题【市级联考】吉林省长春市普通高中2019届高三质量检测(三)数学(文科)试题江西省南昌市第二中学2019-2020学年高三第四次月考数学(文)试题2020届四川省泸县第一中学高三下学期第一次在线月考数学(理)试题2020届四川省泸县第一中学高三下学期第一次在线月考数学(文)试题河北省石家庄市第二中学(南校区)2019-2020学年高三下学期教学质量检测模拟数学(理)试题(已下线)理科数学-2020年高考押题预测卷03(新课标Ⅱ卷)《2020年高考押题预测卷》(已下线)文科数学-2020年高考押题预测卷03(新课标Ⅱ卷)《2020年高考押题预测卷》(已下线)专题23 不等式选讲-2020年高考数学(文)母题题源解密(全国Ⅲ专版)
名校
7 . 设数列
的前n项和为
.满足
,且
,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3219353c9f4d45d0a1562102a4eb9fb8.png)
(1)求数列
的通项公式;
(2)证明:对一切正整数n,有
.
![](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/c8a4e5523dffbdc4f0fa2213f89ce771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3219353c9f4d45d0a1562102a4eb9fb8.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)证明:对一切正整数n,有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ab5128a0393c0a1dce8af96f24de54f.png)
您最近一年使用:0次
2019-05-20更新
|
633次组卷
|
4卷引用:湖南师范大学附属中学2018-2019学年高三下学期第六次月考数学(理)试题
8 . 对于数列
,若存在常数M>0,对任意的
,恒有
,则称数列
为
数列.
(Ⅰ)首项为1,公比为
的等比数列是否为B-数列?请说明理由;
(Ⅱ)设
是数列
的前n项和,给出下列两组判断:
A组:①数列
是B-数列, ②数列
不是B-数列;
B组:③数列
是B-数列, ④数列
不是B-数列.
请以其中一组中的一个论断为条件,另一组中的一个论断为结论组成一个命题.判断所给命题的真假,并证明你的结论;
(Ⅲ)若数列
是B-数列,证明:数列
也是B-数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841e33da64313613449ed8a83acfa8c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d726666f99a5a41dd673a2330e377b17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e5581ede419bac69606ecf2c33c33b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841e33da64313613449ed8a83acfa8c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94afeb56aca2544aba142b47e764706f.png)
(Ⅰ)首项为1,公比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f94407f032de7a4c49ec6dc8809133c.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983f7e1cd303dc3c2a69ec0aa022f41e.png)
A组:①数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983f7e1cd303dc3c2a69ec0aa022f41e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983f7e1cd303dc3c2a69ec0aa022f41e.png)
B组:③数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2215fdbe45cf68e4c9593df1b5530958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2215fdbe45cf68e4c9593df1b5530958.png)
请以其中一组中的一个论断为条件,另一组中的一个论断为结论组成一个命题.判断所给命题的真假,并证明你的结论;
(Ⅲ)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf0e80342bbb5504fa59b1489c5dbec.png)
您最近一年使用:0次
2013·湖南怀化·二模
9 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e80b2eae6889f846beac6a9838d56cf.png)
(Ⅰ)若函数
在其定义域上为单调函数,求
的取值范围;
(Ⅱ)若函数
的图像在
处的切线的斜率为0,
,已知
求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc8ff45a914ab5f543a650f52e0ff41.png)
(Ⅲ)在(2)的条件下,试比较
与
的大小,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e80b2eae6889f846beac6a9838d56cf.png)
(Ⅰ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52fc87894b7dc5243958efddeacd2429.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158090c8f36db143df11db2e10476894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc8ff45a914ab5f543a650f52e0ff41.png)
(Ⅲ)在(2)的条件下,试比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b79af563f04a6239cd0ade8e51fd258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
您最近一年使用:0次