(1)等差数列
的各项均为正数,
,前
项和为
,
,求
;
(2)已知函数
,
,求
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.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/df86c3739c68507ed95bd207b2e78c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c7cd11b1791e2f84cf90319aa49d82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c706e6ba85b53f5828207ff5f3c999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
更新时间:2017-02-08 11:16:09
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b441d20a1706eb85df717cd1cfe630.png)
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