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 查看更多[2]
更新时间:2019-01-30 18:14:09
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】数列
的前n项和
满足
.
(1)求数列
的通项公式;
(2)若数列
为等差数列,且
,
,求数列
的前n项
.
![](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/e3c07d6d0c63061e09e36b5a2c74760b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a04fcf0a152b19d49cac680b6199c320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7e95fdd905d738ad6ad3c400176874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec4bdc2a6d4fc387dc621f0b5a268c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐2】已知等差数列
满足:
,
.
的前n项和为
.
(Ⅰ)求
及
;
(Ⅱ)令
(
),求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6278d3cc0086c7aab6ac20712c7d0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbcd66661bbf309a42b56bee0c89d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(Ⅱ)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b06e66a0c35d479000bcc06e09ed3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a6fd92b8d7ce448d874c5e612056ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】已知数列
的前
项和为
,且满足
(
),
.
(1)求
;
(2)求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/117f4658cce3b956076fb65090ca3f4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】数列
的前
项和为
,已知
,
.
(1)求
的通项公式;
(2)求数列
的前
项和
.
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393fed801c4d13e80c2af559441db528.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5d0e8e286c36f92b8d399a58ebd02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】已知数列
的前n项和为
,
,
,
.
(1)求证:数列
是等差数列;
(2)令
,数列
的前n项和为
,求证:
.
![](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/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd231d21b6e06beffecff1bf6c18896e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80759fdc78c76b05dab66c325f48a443.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27b515f1a285ff1286ac597cce326b3.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/c02e80983b88cdf6b540502816c87d13.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知数列
满足
,且
;
时,
.其中
是数列
的前
项和.
(I)求数列
的通项公式;
(II)若对于
,
,不等式
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69109f10f5af08596928c68bf9b645cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(I)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(II)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b1145a5a5c3bf0b30022c74bd37f403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次