解题方法
1 . 已知数列
,
,其前n项的和为
,且满足
.
(1)求数列
的通项公式;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2cb30ad59c994707ab5c62be9ed6f18.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf0c2e4e6075f1c98223ef358e63e5f5.png)
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2023高三·全国·专题练习
2 . 设数列
满足
,
.
(1)证明:
.
(2)设数列
的前n项和为
,证明:
.
![](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/fb2dbc4c08aa70076c1c12daeedcb298.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c31f2f5b97bc76078c101082bb76bb6.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffb575d8e0365de6ccab0d0645fc78a.png)
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名校
3 . 已知无穷数列
满足
,其中
表示x,y中最大的数,
表示x,y中最小的数.
(1)当
,
时,写出
的所有可能值;
(2)若数列
中的项存在最大值,证明:0为数列
中的项;
(3)若
,是否存在正实数M,使得对任意的正整数n,都有
?如果存在,写出一个满足条件的M;如果不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ba6d5fdf4c491c1332483be3cfab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37f161c1dd788025cef9910858df7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c03a27be8ae82e24b86cc52a92204c28.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a65d8762e567f485f39f81564b593a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5612ce06759d0f77ca029d10083f7d1e.png)
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2023-05-05更新
|
3790次组卷
|
19卷引用:北京卷专题18数列(解答题)
北京卷专题18数列(解答题)(已下线)北京市第四中学2024届高三上学期10月月考数学试题变式题16-21(已下线)专题01 条件开放型【练】【北京版】(已下线)【一题多变】取大取小 分类讨论(已下线)数列新定义(已下线)(新高考新结构)2024年高考数学模拟卷(二)北京市朝阳区2023届高三二模数学试题北京一零一中学2024届高三上学期统考一数学试题北京市景山学校2024届高三上学期10月月考数学试题(已下线)北京市第四中学2024届高三上学期10月月考数学试题北京市东城区东直门中学2024届高三上学期期中数学试题2024年全国普通高中九省联考仿真模拟数学试题(二)(已下线)高三数学开学摸底考02(新考法,新高考七省地区专用)广东省2024届高三数学新改革适应性训练二(九省联考题型)北京市第二中学2023-2024学年高三下学期开学考试数学试卷上海市杨浦区复旦大学附属中学2024届高三下学期3月月考数学试题北京市顺义区第九中学2023-2024学年高三下学期3月月考数学试题广东省云浮市云安区云安中学2024届高三下学期3月模拟考试数学试题北京市海淀实验中学2024届高三上学期10月月考数学试题
4 . 已知数列
的各项均为非零实数,其前
项和为
,且
.
(1)若
,求
的值;
(2)若
,
,求证:数列
是等差数列,并求其前
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/f3d5de845650557c7ec0839317f025de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63485189886f6d09bf8914bf6ccb1ffb.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa148a6b8e55a08d7e1ce1a435b83fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fab51121848ce166035ceab6f4e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0851a5dc31f0e16217a7cf3588e23aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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名校
解题方法
5 . 设数列
的前
项和为
,已知
,
是公差为2的等差数列.
(1)求
的通项公式;
(2)设
,数列
前
项和
,证明:
.
![](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/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06143bd711d5af589ee94f419435788e.png)
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2023-05-13更新
|
987次组卷
|
3卷引用:专题11 数列前n项和的求法 微点3 裂项相消法求和(一)
(已下线)专题11 数列前n项和的求法 微点3 裂项相消法求和(一)湖北省黄冈市浠水县第一中学2023届高三下学期5月高考仿真模拟数学试题新疆巴音郭楞蒙古自治州若羌县中学2024届高三上学期6月摸底考后强化数学试题
6 . 已知数列
满足
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4790051473794b1ca06203053f1c5450.png)
(1)证明:数列
为等差数列;
(2)若将数列
中满足
的项
,
称为数列
中的相同项,将数列
的前40项中所有的相同项都剔除,求数列
的前40项中余下项的和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4790051473794b1ca06203053f1c5450.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf33b2a94eae16760d746f9b4b8dbc.png)
(2)若将数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614dff0cb877d00d301584ccb5dbccda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ec9750f7fa76896d96298a58c2546e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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名校
解题方法
7 . 已知数列
满足
,其中
是
的前
项和.
(1)求证:
是等差数列;
(2)若
,求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5274adf9ab52f082fb4f8f557e701621.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)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cefeddf71dca8ae824328df3f0e5e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96808f01aeed65b5c83fabb86661009b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2023-01-09更新
|
2055次组卷
|
4卷引用:第四节 数列求和 (讲)
8 . 已知数列
满足
,
,
.
(1)证明:
是等比数列;
(2)证明:存在两个等比数列
,
,使得
成立.
![](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/d1928c254cfada1f75a5cd1e34db5a63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac416116febcf793fee4ccc78a27b15.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40dc43b8d11d5462e4b525dd7b03bcfc.png)
(2)证明:存在两个等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb2db37e079b735acc41ea3035139e9.png)
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2023-05-05更新
|
2470次组卷
|
5卷引用:专题6 等比数列的判断(证明)方法 微点3 性质法
(已下线)专题6 等比数列的判断(证明)方法 微点3 性质法(已下线)第04讲 数列的通项公式(十六大题型)(讲义)-4江苏省七市(南通、泰州、扬州、徐州、淮安、连云港、宿迁)2023届高三三模数学试题辽宁省锦州市2022-2023学年高二下学期期末数学试题江苏省南通市2023届高三第三次调研数学试题
9 . 已知数列{
}满足
.
(1)求证:数列
是等差数列;
(2)求数列{
}的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f0b7aac7e4a82c3185fad6184d08b14.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
(2)求数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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2023-01-31更新
|
1340次组卷
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3卷引用:专题3 等差数列的判断(证明)方法 微点4 等差数列的判断(证明)方法综合训练
(已下线)专题3 等差数列的判断(证明)方法 微点4 等差数列的判断(证明)方法综合训练河南省郑州励德双语学校2021-2022学年高二上学期第一次月考数学试题 福建省福州市永泰县第一中学2023-2024学年高二上学期适应性练习数学试题
10 . 已知数列
的前
项和为
,且
,
.
(1)证明:
为等比数列;
(2)若
,求
.
![](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/4afcba984f31d2d1f1d1eacfba6c735b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b8f88627b97ea3e58be2bf6a2b5e26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524824d2cc64eeb9e9e267fc56a1fc94.png)
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