10-11高三·浙江·阶段练习
1 . 设等差数列{an}的首项a1为a,公差d=2,前n项和为Sn.
(Ⅰ) 若S1,S2,S4成等比数列,求数列{an}的通项公式;
(Ⅱ) 证明:
n∈N*,Sn,Sn+1,Sn+2不构成等比数列.
(Ⅰ) 若S1,S2,S4成等比数列,求数列{an}的通项公式;
(Ⅱ) 证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dac463bbb7375dbf8e2246f9a6f0d9.png)
您最近一年使用:0次
名校
解题方法
2 . 已知
是等差数列,其前
项和为
,
是等比数列,且
,
,
.
(Ⅰ)求数列
与
的通项公式;
(Ⅱ)记
,
,证明
(
,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5a7a17a394e868e0acd1803a9ab795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da00560d18f576a37bcc21459698145f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b224a65a8f2d495d327e4a488c0dba1.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(Ⅱ)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4ed9d2c4f561c118ad7581fda564bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e98a2cb8bcf8604c83b02e78693eff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9153fb853cd99beec9e600a4eaf73fe8.png)
您最近一年使用:0次
2016-12-05更新
|
595次组卷
|
3卷引用:2017届山西孝义市高三上学期二轮模拟数学(文)试卷
解题方法
3 . 设数列
的前
项和为
,已知
.
(1)求
的值,并求数列
的通项公式;
(2)若数列
为等差数列,且
,
.设
,数列
的前
项和为
,证明:对任意
,
是一个与
无关的常数.
![](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/2a949de98f4a687d4cbc5f8f748117a3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](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/34a0e2133efdfa65dcb4f925a6eac33b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a014bfab69a113e80dd40d72af8dc9d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9221c0c92a526f65533cdc5400767af.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea31accf763fcbe0384ce37f1fbb8ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2016-12-03更新
|
426次组卷
|
3卷引用:2016届湖南师范大学附中高三上学期月考三文科数学试卷
4 . 已知等差数列
中,![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273900298240/1572273906089984/STEM/d288181c8f6b4fccb2a6c09f8369264a.png)
.
(1)求数列
的通项公式;
(2)令
,证明:
.
![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273900298240/1572273906089984/STEM/4c04cdbf7d774c6ea5804631693b202c.png)
![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273900298240/1572273906089984/STEM/d288181c8f6b4fccb2a6c09f8369264a.png)
![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273900298240/1572273906089984/STEM/ff892ab8d6834cc0b0176c834d130b2d.png)
(1)求数列
![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273900298240/1572273906089984/STEM/4c04cdbf7d774c6ea5804631693b202c.png)
(2)令
![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273900298240/1572273906089984/STEM/7c65416e4b4e48c1a69dbe7e826b7eb2.png)
![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273900298240/1572273906089984/STEM/607b31b2f40c435b86bb25ffa36e938c.png)
您最近一年使用:0次
2016-12-03更新
|
1126次组卷
|
2卷引用:2016届宁夏银川市二中高三上学期统练二理科数学试卷1
2012·四川成都·一模
5 . 等差数列
的各项均为正数,
,前
项和为
;
为等比数列,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e001416034154dd231035fcab2424d7a.png)
,
.
(1)求数列
和
的通项公式;
(2)令
,
;
①求
;②当
时,证明:
.
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e001416034154dd231035fcab2424d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6911ffca9a70531c9aaaf52cc88e4489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510406d67dc252baa85b05191219599d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e60d3f932e305e6b151a695905d2702f.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01cbf8c45d0bb8e7990929cc5c51d59e.png)
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解题方法
6 . 设等差数列
的前
项和为
.且
.
(1)求数列
的通项公式;
(2)令
,数列
的前
项和
,证明:对任意
,都有
.
![](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/cb6729e3fed1afd45e8b52bfa8fee8bb.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b11849b4064846173587dda13276dda.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/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3b251e07a6f3d915290b1fe52e1654.png)
您最近一年使用:0次
7 . 已知公差不为零的等差数列
,满足
,且
成等比数列.
(1)求数列
的通项公式;
(2)设
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f5a39d8445aa4b263b285906c6e86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b3d2cc886c68ce0716a1b9c476f558.png)
(1)求数列
![](https://img.xkw.com/dksih/QBM/2015/6/16/1572127128469504/1572127134539776/STEM/37524ecbc1c64ad98192c0b16e886f34.png?resizew=31)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48900296ad3ea9c92578de3b58e8445f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9389e904d728eb9cffeb4c5e865fab22.png)
您最近一年使用:0次
解题方法
8 . 设等差数列
的前
项和为
,且
(
是常数,
),
.
(1)求
的值及数列
的通项公式;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3298870a98a8b15946a4cd8750bb5733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361386446d504a14471b9fd89130f1c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82250affdcd1bee968268d0e3b37d19.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024162cd10cb65433782761ae88cf446.png)
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11-12高三下·浙江台州·阶段练习
9 . 设等差数列{an}的首项a1为a,公差d=2,前n项和为Sn.
(Ⅰ) 若S1,S2,S4成等比数列,求数列{an}的通项公式;
(Ⅱ) 证明:
n∈N*, Sn,Sn+1,Sn+2不构成等比数列.
(Ⅰ) 若S1,S2,S4成等比数列,求数列{an}的通项公式;
(Ⅱ) 证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dac463bbb7375dbf8e2246f9a6f0d9.png)
您最近一年使用:0次