名校
解题方法
1 . 设数列
满足
,
,当
.
(1)计算
,
,猜想
的通项公式,并加以证明.
(2)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/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae90697c66be9e17437eaec2feaf0bd0.png)
(1)计算
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4168dc07f0db5540afc55f886b2ab069.png)
您最近一年使用:0次
2020-10-11更新
|
951次组卷
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3卷引用:云南师大附中2021届高三适应性月考(二)理科数学试题
2020高三·全国·专题练习
2 . 已知数列{an}中,a1=
,其前n项的和为Sn,且满足an=
(n≥2).
(1)求证:数列
是等差数列;
(2)证明:S1+
S2+
S3+…+
Sn<1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4945cc7ac60ff735b1d93eb460fb62f5.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714a3771e8f28b93b177be0719fc67a9.png)
(2)证明:S1+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6a2eba56d4f2d1670b0256b8d86b92.png)
您最近一年使用:0次
3 . 已知数列
满足
,
,
.
(1)证明数列
为等差数列,并求数列
的通项公式;
(2)数列
的前
项和为
,
,
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb826b0eee0ec278a944d5c78685c050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddba81ba5cba651c58b8ef0ac64985c.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b01041691ad489f126f05c18ea8f0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4cb59264646eae8a5d5fdf0f76e5461.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/3a24e6bcf49b8e45531a2d4e4c70c181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876b4d97aab7bf4e2b5e7889acf68d0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02e80983b88cdf6b540502816c87d13.png)
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4 . 已知数列
满足
.
(1)求证:
为等比数列,并求
的通项公式;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c96bb3ed7ee6c1c7cc6828906c6d6cf.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f774872ffec6c34cadeb450cfefdb11e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881ed9e485c5bc47c7d9cc8a69ce3d11.png)
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名校
解题方法
5 . 已知数列
中,
,其前
项的和为
,且当
时,满足
.
(1)求证:数列
是等差数列;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.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/b3c154da7ed535cfd1edf19bc6d907ae.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd74d291484f4da59ac2149d2ec135c.png)
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2019-12-01更新
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1846次组卷
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7卷引用:湖北省荆州中学、宜昌一中、龙泉中学三校2019-2020学年高三联考数学(理)试题
6 . 已知数列
满足:
,
.
(I)证明数列
是等比数列,并求数列
的通项;
(II)设
,数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae3955ac2e3faed35e9fed58902701f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
(I)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8a6d5a6590def48fc20598994c8079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(II)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913c8da3596d839e79e8940b7d0d01c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2bb3955261f31d62238d3d433a4877.png)
您最近一年使用:0次
7 . 已知数列
满足
.
(1)证明数列
是等比数列,并求数列
的通项公式;
(2)数列
满足
,
为数列
的前
项和,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e9503b83ec3fa2939923ae5e4d6902.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8da2e317b095db07efdfa8bea95e3b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2c71bf821df60553783704f41cd6c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8dc623a9bac29298adee9a51208790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9928e46511e601913619a427ded84a3.png)
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2017-11-13更新
|
469次组卷
|
3卷引用:湖北省鄂东南省级示范高中教育教学改革联盟2018届高三上学期期中联考数学文试题1
解题方法
8 . 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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9 . 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)
您最近一年使用:0次
解题方法
10 . 已知数列
的前
项和为
,若
(
),且
.
(1)求证:数列
为等差数列;
(2)设
,数列
的前
项和为
,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/da0de663d238804af3dc72f89869f07d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dafd98e5b223908b13013c3cacc0386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/912e36fb10d6c3a42f034ed7c872fe91.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/6828a1cf75f19bb74a0e0490bd65c168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dafd98e5b223908b13013c3cacc0386.png)
您最近一年使用:0次
2016-12-04更新
|
400次组卷
|
2卷引用:2016届黑龙江省哈尔滨师大附中高三12月考文科数学试卷