解答题-问答题 适中0.65 引用2 组卷273
已知函数
的 图像经过点
,
,
为数列
的前n项和.![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/b1b6d41e1256498bb31b8f331e2efb72.png)
(1)求
及![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/dd7133cdce62452c8d3e22ea930ffd71.png)
(2)若数列
满足
,记![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/68d49f8d51e945059f9ac4d364e0c422.png)
,若
对
恒成立,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/04fa8119b66647d99246c101b25d5a91.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/a580e6b5f95a4a5da3c0daf818e8df45.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/aad6727a9e4e48cb89c4684753712b2b.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/9bab4b7c9fad4459acc0a6b30c64589e.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/79b35198fead4116a044ea29105df578.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/b1b6d41e1256498bb31b8f331e2efb72.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/25beca59b40a4bde9720d7aa58f894b1.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/dd7133cdce62452c8d3e22ea930ffd71.png)
(2)若数列
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/0adb2a0d6fea4823a36bd3602100ceea.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/fb7a8e8f42bd4feba3e6255eea8dbc03.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/68d49f8d51e945059f9ac4d364e0c422.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/b1b6d41e1256498bb31b8f331e2efb72.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/e7443c31e5cd4ed4b495c8e536149b1e.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/b1b6d41e1256498bb31b8f331e2efb72.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728168992768/1569728174391296/STEM/259e860191f74ddf948f35461b15324c.png)
9-10高一下·河北衡水·期中
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