一、选择题:在每小题给出的四个选项中,只有一项是符合题目要求的.
A.91 | B.152 | C.218 | D.279 |
【知识点】 利用an与sn关系求通项或项
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3903653955c424d3f6135edc5b47e231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8135f55f05e7d65f3b5920e5967608b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.png)
A.15 | B.16 | C.49 | D.64 |
【知识点】 由Sn求通项公式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dccc60738f39c78238b0670e4f319b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08be9681cf2689ffe4049c6dbb7b171f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 由递推关系式求通项公式 由递推关系式求通项公式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cead34faf15b5af316cc401e0382133c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb71aacea5a3e019c3d081428834f85.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45dde5e71c686bfc9022149ce8197c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b30c3d7cc1e41af67e909df3f39830.png)
A.2019 | B.![]() | C.4037 | D.![]() |
【知识点】 递推数列的实际应用 由递推关系证明数列是等差数列
二、填空题
【知识点】 由递推数列研究数列的有关性质 根据线性规划求最值或范围解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663415200828af8b8d7ef327892bf633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177c64702e115d54fdf014506aceb0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85bda46cc51c938224d9165301e3896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2798e1dcab1f7f0fe3b8a94b3cd6a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b3e29368be117111736d41f61d96b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5251d73212aa8f12982262a2881a997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283940ac83e374121f05ffa138a181a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87ffa8427cad5122e4df309ca2fdb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
【知识点】 三角函数图象的综合应用解读 累加法求数列通项 由递推关系式求通项公式
三、解答题
(1)求数列{an}的通项公式;
(2)若对任意的n∈N*,不等式(λ﹣n)an+1+an≤15恒成立,求实数λ的最大值.
【知识点】 判断数列的增减性 由递推关系证明等比数列 数列不等式恒成立问题
(1)求证:数列{an+1}是等比数列,并求an;
(2)若数列{bn}为等差数列,且b3=a2,b7=a3,求数列{anbn}的前n项Tn.
【知识点】 等差数列通项公式的基本量计算 由递推关系证明等比数列 错位相减法求和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3bc907fe03ad648a78548de36bcc6c.png)
(1)求{an}的通项公式;
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c4ca41def22dcbe39612798d98297b.png)
【知识点】 错位相减法求和 利用an与sn关系求通项或项
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/dca63530febd6a3c48588972a5f45f99.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)求使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4f1f5d4636bac95e45d190892493b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
【知识点】 由递推关系证明等比数列 前n项和与通项关系
(1)求数列{an}的通项公式;
(2)设bn=log2an,数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fe4511594eacc61f7d6990431024ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
【知识点】 由递推关系证明等比数列 裂项相消法求和