名校
解题方法
1 . 已知数列
的首项
,且
,
.
(
)证明数列
是等比数列并求数列
的通项公式.
(
)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853eace02560e7f1490694276c29a856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48aac05ba23217b211cfb265543af298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ad4897a05a6a26b10e2d8379137fa1.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414656636a840bbb9a031d6103239fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf1dd038a36c7dfed064ef8d389871f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9880952857950577055578875ab29141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ba52f89159b5c2eea55eb25c0973a28.png)
您最近一年使用:0次
2018-06-29更新
|
493次组卷
|
2卷引用:【全国百强校】陕西省西安中学实验班2016-2017学年高一下学期期末数学试题
11-12高三上·江西吉安·阶段练习
解题方法
2 . 已知函数
定义在区间
上,
,对任意
,恒有
成立,又数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39e9750639ea9f661160b07ef199080.png)
(1)在
内求一个实数
,使得
;
(2)求证:数列
是等比数列,并求
的表达式;
(3)设
,是否存在
,使得对任意
,
恒成立?若存在,求出m的最小值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc30165c18de623d0a3efb961e606d1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1947266214c98cfdeea15425a47de17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbf98e40f2f23810467a5c599ea62c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69981c8961775af5e1529d56a1a0d1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39e9750639ea9f661160b07ef199080.png)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc30165c18de623d0a3efb961e606d1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fd9f63cfe52e25c09dd129a261a436.png)
(2)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c704d7054cbdc9d975d4326091cc5251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05899f022bc5f29ad8ba7b2a92896b06.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf638f106724e6319edfa9c7de05f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f29c06a3e9a73e905eb87d71efa201c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ec99f68c85bcfcc9d2e34067b21011.png)
您最近一年使用:0次