数列
的前
项和为
,若
,点
在直线
上.
(Ⅰ)求证:数列
是等差数列,并求
的通项公式
;
(Ⅱ)若数列
满足
,求数列
的前
项和
;
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/2be9803704f44ad6b7e54efa31065253.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/dc631019001540e2bf01a7cea75b4300.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/164c44af12784ed88c072a7a39c4cfa9.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/07520f08997442faa423c9ccbf7e5f22.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/0858f28876f344c59311e2facd87386c.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/54ee0cc1e579477189bbc273e3b4d4f0.png)
(Ⅰ)求证:数列
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/8d5b1260ab1d4393b4b2f5933f68bb8b.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/2be9803704f44ad6b7e54efa31065253.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/90ecaf79acc74202ba34a411deeaf1a2.png)
(Ⅱ)若数列
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/0be0994db21a4afb9dc14866d7b89d13.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/851dd16ab4704b429195fdd7706b5882.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/0be0994db21a4afb9dc14866d7b89d13.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/dc631019001540e2bf01a7cea75b4300.png)
![](https://img.xkw.com/dksih/QBM/2010/11/16/1577386596491264/1577386598359040/STEM/c5a165b6b4c14f188e60228c740bfe22.png)
10-11高二上·辽宁沈阳·期中 查看更多[1]
(已下线)2010年辽宁省沈阳四校联合体高二上学期期中考试理科数学卷
更新时间:2010-11-16 21:02:21
|
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
【推荐1】已知数列
为正项等比数列,满足
,且
构成等差数列,数列
满足
.
(1)求数列
,
的通项公式;
(2)若数列
的前
项和为
,数列
满足
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df1038200f2d97a52c716aab6c3bcb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acce76e9f4eada0ce411e19bef596488.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64050dbea86fd9fb24a897deb39584fa.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://img.xkw.com/dksih/QBM/2019/5/21/2208396657827840/2209166851801088/STEM/94afdd5992ae41ec88726b442250d611.png?resizew=13)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8090e9b78f93b7a9512bb3cb93eaa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://img.xkw.com/dksih/QBM/2019/5/21/2208396657827840/2209166851801088/STEM/94afdd5992ae41ec88726b442250d611.png?resizew=13)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】已知数列
前n项和![](https://img.xkw.com/dksih/QBM/2015/11/6/1572280580694016/1572280586788864/STEM/32edb94708db47eda5444713d8597477.png)
(1)求数列
的通项公式;
(2)求数列
的前
项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://img.xkw.com/dksih/QBM/2015/11/6/1572280580694016/1572280586788864/STEM/32edb94708db47eda5444713d8597477.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8efb2b22b50a9626c29d53cbc13ff7b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】已知数列
是等差数列.
(1)若
,
,求
;
(2)若
,
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6d8a8a57db1c2fc7f465d2cfd2aa78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3cf6f2bbe20a404fea41a4d2b1c4c7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09ee990503e5b3608267fbd91cf16d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8000007201d28a54901c28b9feb6f62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次