解答题-问答题 较难0.4 引用1 组卷1203
若正数项数列
的前
项和为
,首项
,点
,
在曲线
上.
(1)求
,
;
(2)求数列
的通项公式
;
(3)设
,
表示数列
的前项和,若
恒成立,求
及实数
的取值范围.
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/bd415b14384041888897abbada63b0ec.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/ed1c90df3dca4961a46bb1eb577d2fa4.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/1f8c2a55b0d24d42b5bfa414f4a152cf.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/18f879550ef44ea6a2642aabc2a1a1b5.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/1f1c3ccfef0340bbacfb31ab25b612cc.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/21b66d6d63e0471896686275d31a104e.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/5dd73ccede374317bb2cbf2b1eeeed34.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/fa0c37d5d99d4f49a7cd26a7002922c3.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/17dd1d7017af4b66aff3bbc290327930.png)
(2)求数列
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/bd415b14384041888897abbada63b0ec.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/fec7ab20d63e4103bbbf6837b7e66137.png)
(3)设
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/429bd5d3b6f9465ea9e89437984689cb.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/ddb0440edb434fd48a9173d2ab487707.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/47311b156fb541f0a541adaec266d72d.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/4c56a31c78d6454789b72b47a2348765.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/ddb0440edb434fd48a9173d2ab487707.png)
![](https://img.xkw.com/dksih/QBM/2014/3/13/1571560087232512/1571560093032448/STEM/4bb1f71482a345f4a05a9bdd894b46e0.png)
14-15高三上·天津河西·开学考试
类题推荐
组卷网是一个信息分享及获取的平台,不能确保所有知识产权权属清晰,如您发现相关试题侵犯您的合法权益,请联系组卷网
组卷网是一个信息分享及获取的平台,不能确保所有知识产权权属清晰,如您发现相关试题侵犯您的合法权益,请联系组卷网