已知数列
的前
项和是
,
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404c9fa1fc3222fa342bde316e9dc715.png)
(Ⅰ)求数列
的通项公式
(Ⅱ)求证:对任意的
,不等式
成立.
![](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/04e406b775bbaa0ae52dab5b7bd384a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404c9fa1fc3222fa342bde316e9dc715.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)求证:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4a79abd9c15a3cfc93d6923661b90f4.png)
更新时间:2019-06-13 11:04:38
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】已知各项均为正数的数列
的前n项和为
,且满足
,数列
为等比数列,且满足
,
.
(1)求数列
和
的通项公式;
(2)求证:
;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9295f2addeeddbc3250bf55b7d215cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0c59ece1bed4ab6671dd3ff48d83b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adb5c3f7faecf0eb7c37625f7b363e0a.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce389f6586910fa61511cb151f05748.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐2】已知数列
的前n项和为
,且
.
(Ⅰ)求数列
的通项公式;
(Ⅱ)令
,求数列
的前n项和
及
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fef7bc944782376ff708e30a1fefac3.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba65d7d9b9355d3673b05312ca514429.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
【推荐1】已知数列
中,
,
(1)求
的通项公式;
(2)设
,
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b60aea2dbc2728f7b16d3dd7f6980b4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783783443fa0bfe44af98c2962c9f865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a9b9aa4609d80ec1ef16dc0d2fb6dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d044d6d466267b8a89b2259af214fe8d.png)
您最近一年使用:0次