解题方法
1 . 已知数列
中,
.
(1)证明数列
是等比数列,并求数列
的通项公式;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/276c5f3b4789ea8f7ad7a027aef06573.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5098d1c188d22ce4eb8813f87d86460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c40149cec794d9c5e9d925ab7d0ce8.png)
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2 . 观察下列三角形数表,数表(1)是杨辉三角数表,数表(2)是与数表(1)有相同构成规律(除每行首末两端的数外)的一个数表.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/13/4e01be6b-e1ac-4d7a-977f-18fac8398e01.png?resizew=535)
对于数表(2),设第
行第二个数为
(
)(如
,
,
).
(1)归纳出
与
(
,
)的递推公式(不用证明),并由归纳的递推公式求出
的通项公式
;
(2)数列
满足:
,求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/13/4e01be6b-e1ac-4d7a-977f-18fac8398e01.png?resizew=535)
对于数表(2),设第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6278d3cc0086c7aab6ac20712c7d0bd.png)
(1)归纳出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7230de53663c75658c58bbf206a0085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b54fb89f0facd6e6884d0c0a4408165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a44d1e1408bb4b401b763d931fbb8e9.png)
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名校
3 . 已知数列
中,
,
(
),
.
(1)证明:数列
为等差数列,并求出数列
通项公式;
(2)设
,数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f1e4ae0f73b3ca199ffd7b2c7af5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd2b2b1c9c82997b28888cef839e67b.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ebdf7b1804ea9d1ad03f7a9a04f4f0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.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/c02e80983b88cdf6b540502816c87d13.png)
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名校
4 . 在单调递增数列
中,
,且
成等差数列,
成等比数列,
.
(1)①求证:数列
为等差数列;
②求数列
通项公式;
(2)设数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5786daa387797fe28543eb25cdcf0193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48aa8f272b068a13e9a61912ed5697cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee635f30f8c1ab7cc90ca44ea5071f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd2bfef3925d6f9f46b96b301c58223.png)
(1)①求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4fffabc2dfb59ac198c06dbcadfa75c.png)
②求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a44cfbb86a4eb76261c00ddc6bff181.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/9fea6ba08b4985e51979378af23595d5.png)
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2016-12-04更新
|
970次组卷
|
4卷引用:2017届河北衡水中学高三上学期第二次调研数学(理)试卷
2017届河北衡水中学高三上学期第二次调研数学(理)试卷2016-2017学年湖北省孝感市七校教学联盟高一下学期期中考试数学(理)试卷河北省保定市定州中学2021届高三上学期期中数学试题(已下线)黄金卷13-【赢在高考·黄金20卷】备战2021年高考数学(文)全真模拟卷(新课标Ⅱ卷)
名校
解题方法
5 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db068384eb677482c2c9df5d0b6ea283.png)
(
),数列
满足
,
.
(1)求
,
,
;
(2)根据(1)猜想数列
的通项公式,并用数学归纳法证明;
(3)求证:对一切正整数
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db068384eb677482c2c9df5d0b6ea283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde4419a36437d5487b6023c3c6eb7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891df8117645539e80f45a36802b1454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(2)根据(1)猜想数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)求证:对一切正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ab2552c239d339a03389d7d043956c.png)
您最近一年使用:0次
2016-12-04更新
|
358次组卷
|
2卷引用:2015-2016学年陕西省汉台中学高二下期中理科数学试卷
6 . 已知
为数列
的前
项和,
(
),且
.
(1)证明数列
是等差数列,并求其前
项和
;
(2)设数列
满足
,求证:
.
![](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/0fcbda323b50f603056b47f141700a0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c7266d90661cf4467f13c6f5eb670c.png)
(1)证明数列
![](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)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5a28cd035abe6bbf35f7d2b50eb917b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb54a0daa91a606fbe2c54263e2814bf.png)
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2014·陕西·模拟预测
7 . 已知数列
的前n项和为
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e7075462365271b0e865509de43363.png)
(1)证明:数列
是等差数列,并求
;
(2)设
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a2eafb3dd274dd9b98d83c38e87802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e7075462365271b0e865509de43363.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a2eafb3dd274dd9b98d83c38e87802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd04c9e114f9b99a8ffbac981a88937.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8d04059bfffc50f39e67adc9a11470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/718f9b9e4032e388f4ad5989962b857e.png)
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8 . 已知数列
中,
,
,其前
项和为
,且当
时,
.
(Ⅰ)求证:数列
是等比数列;
(Ⅱ)求数列
的通项公式;
(Ⅲ)令
,记数列
的前
项和为
,证明对于任意的正整数
,都有
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/2693734765399876e9e93cdb110231c4.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/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80aaee0a349890e37ea889db063a7ff3.png)
(Ⅰ)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
(Ⅱ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅲ)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84474b4fab31b58ba1f449c5fb6066ff.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d545f414ffe5c17ba78e2b889ece2311.png)
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11-12高二上·广东·期末
9 . 已知定义域为
的两个函数
、
,对于任意的
、
满足:
且
.
(1)求
的值并分别写出一个
和
的解析式,使它们满足已知条件(不要求说明理由);
(2)证明:
是奇函数;
(3)若
,记
,
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f370a1d4dd341e5ab1774a66c66c1204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109b8acf40088f0385734c68f7b2747f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a98717f40c32b9ed1a29edc6b9f527.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e38fffbc7ab9882480f4faa72390e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196c05daecd852ab814377d7fbff32b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79581020e07821a3460c1f14f7867fab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2efba990f1fca3fe00fb5e0a7fff0bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a2335e6b3f9e909d19efee454a76f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f877249646e6c4613e2fcb64990dfd.png)
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