已知数列
中
,函数
.
(1)若正项数列
满足
,试求出
,
,
,由此归纳出通项
,并加以证明;
(2)若正项数列
满足
(n∈N*),数列
的前项和为Tn,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f540ed88caf03ebe453553969e43944.png)
(1)若正项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6aa8089b5d9b722aff679af3c4d289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若正项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf9e123fb1b7cf9edb5d53f82a42def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89d1f32c1605cfdb8e8855051b9f6ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99cf906aaaf67f8ff2d23af499c37f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e06b0fda8954c395f1a3ccfbc88698.png)
更新时间:2016-12-03 19:04:44
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名校
解题方法
【推荐2】已知等比数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1cec6d5a4a7eb8600e1f5afd18bb27c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c66134c9d24d5757235f2dd63b2aacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfc9203137bbf468e73b0f0ebca9176.png)
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