名校
解题方法
1 . 已知数列
满足
,
,
,
成等差数列.
(1)求证:数列
是等比数列,并求出
的通项公式;
(2)记
的前n项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2438f2272d7b7ab51dbbe587025a553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/479c0564241789f8f52ac4fda26e9904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6197e2365d7f39507f8671acfc25a339.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213e22890204937a5dded4436369390f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](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/ef130855c8dc1accbff28762858f20bf.png)
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2024-06-09更新
|
553次组卷
|
2卷引用:江西省赣州市2023-2024学年高三下学期5月适应性考试数学试题
2 . 已知a,b,c为三角形的三边.
(1)求证:
;
(2)若
,求证:
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756084350ee839aa662bb1b39fa962db.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09cad84c1fa1dbfdc03fb5441c039a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b6d7b31981b8dc5e2ac863e5a25fda.png)
您最近一年使用:0次
解题方法
3 . 已知a,b,c为正数,且
.
(1)是否存在a,b,c,使得
?若存在,求a,b,c的值;若不存在,说明理由.
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a57e060f61f7efa54982bda67db483a.png)
(1)是否存在a,b,c,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d8406e8832ba0c8abdd9b9b4dd1945.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65186b3f16edc4e25666301b4391684.png)
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2023-05-20更新
|
350次组卷
|
3卷引用:四川省大数据精准教学联盟2022-2023学年高三第二次统一监测数学(理)试题
名校
解题方法
4 . 设
均不为零,且
.
(1)证明:
;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad115efc45e16408532f2cd53ae3232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58634bd54035e669835bc746ad590b90.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35a356a1ab0c75e51c2f6a2a81fc404.png)
您最近一年使用:0次
2023-03-16更新
|
777次组卷
|
11卷引用:内蒙古包头市2023届高三下学期一模文科数学试题
内蒙古包头市2023届高三下学期一模文科数学试题内蒙古包头市2023届高三下学期一模理科数学试题(已下线)内蒙古包头市2023届高三一模理科数学试题甘肃省兰州市第五十八中学2022-2023学年高三下学期第二次模拟考试数学(理科)试卷陕西省联盟学校2023届高三下学期第三次大联考理科数学试题陕西省联盟学校2023届高三第三次大联考数学(文)试题(已下线)专题22不等式选讲(已下线)专题21不等式选讲(已下线)专题10-2 不等式选讲题型归类(讲+练)-2四川省德阳市第五中学2023-2024学年高三上学期9月月考数学(理)试题四川省德阳市第五中学2023-2024学年高三上学期9月月考数学(文)试题
名校
5 . 已知
,抛物线
与
轴正半轴相交于点
.设
为该拋物线在点
处的切线在
轴上的截距.
(1)求数列
的通项公式;
(2)设
, 求证:
(
且
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b1310ac23301a3244c5be58b4874f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98140638c614f73c82e680469948c700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f036c90d708ef3bfaea4f28ddaa33ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
您最近一年使用:0次
2022-10-06更新
|
1532次组卷
|
4卷引用:河北衡水中学、石家庄二中、雅礼中学、长郡中学等名校2023届高三模拟(一)数学试题
6 . 已知
是首项为1,公差不为0的等差数列,且a1,a2,a5成等比数列.
(1)求数列
的通项公式;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/126b21c9e0cd3bb6c5edb9eeb94b4a85.png)
您最近一年使用:0次
2022·全国·模拟预测
解题方法
7 . 已知函数
.
(1)若不等式
恒成立,求实数a的取值范围;
(2)根据(1),证明不等式:___________.
①
;②
.从这两个不等式中任选一个,补充在上面问题中并作答.注:如果选择多个不等式分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf01622baa63c9d8e64fd9c0d851be7.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d250ec7883a87e0f1fc5aaecd4603fd2.png)
(2)根据(1),证明不等式:___________.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9297c4163d8179b8fe16abee57359be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeff7ae497e1020c4d4ea6a5d64ec681.png)
您最近一年使用:0次
解题方法
8 . 设
,
.
(1)证明:
;
(2)若
且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baca30d4248a82988890bd032d159b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73aa139561269479ba003b04c1d857a3.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d689b0da0bd4803b3e8a6c69542ae466.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4311879d4914afb91646bc4d816c29e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56667aabbe787eb1c3189d487d203e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
您最近一年使用:0次
9 . 已知数列
的前n项和为
,
.
(1)证明:数列
为等比数列;
(2)记数列
的前n项和为
,证明:
.
![](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/e3d56ffde2f190151acbd4f49f704d80.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088948ca1970056aa2774a1904313a92.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.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
2022-03-17更新
|
935次组卷
|
4卷引用:湖南省衡阳市2022届高三下学期一模数学试题
湖南省衡阳市2022届高三下学期一模数学试题(已下线)6.4 求和方法(精讲)宁夏石嘴山市平罗中学2023届高三(重点班)上学期期中考试数学(理)试题(已下线)专题05 数列 第三讲 数列与不等关系(分层练)
解题方法
10 . 已知数列
,
满足
,设数列
,
的前n项和分别为
,
,且对任意的
.
(1)证明:
是等差数列;
(2)记
,证明:
.
![](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/cab08ad0ea5163a02a27b39a6712d4ad.png)
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c798ecd2e19e377c0024a7bb045c6709.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87743e3348c037162aa605bb6bb2220c.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c65af4c289b3459711310e1b5496731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77232a9b750bac64578ce5ab5bc69e30.png)
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