12-13高三上·广东清远·阶段练习
1 . 已知等差数列
中,
,前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abefd52e046716645047ef71ee11f7d2.png)
(1)求数列
的通项公式;
(2)若数列
满足
,记数列
的前
项和为
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae891331ed939383f3d358db40473a7d.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe7bdaaf8b0adf10bf2ef6c1255b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abefd52e046716645047ef71ee11f7d2.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6574b44a3f8e46d987efd602f98ada93.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae891331ed939383f3d358db40473a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132e9579e58d8d5225e2340e1f43adf1.png)
您最近一年使用:0次
10-11高一下·吉林长春·期中
解题方法
2 . 已知数列
的前
项和为
,且对于任意
,都有
是
与
的等差中项,
(1)求证:
;
(2)求证:
.
![](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/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d637866200a82ea682bba7da5a9d9f6.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456acf42591409e1b7dc6fe08f4672e4.png)
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3 . 在数列
中,设
,且
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60940bb0676c66a4e8cc033ddc5fc2fd.png)
,且
.
(1)设
,证明数列
为等差数列;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2a16f300269c09eceee54cbc4712f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4fc8faefb26b233d4aa9dbef043aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60940bb0676c66a4e8cc033ddc5fc2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d307ec71820b6536453fbdb5069da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8182f57c43fd1d8fb13161224687c469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)求数列
![](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)
您最近一年使用:0次
2017-03-22更新
|
1231次组卷
|
2卷引用:2017届吉林省长白山市高三第二次模拟考试数学(文)试卷
4 . 设数列
满足:
.
(1)求证:数列
是等比数列;
(2)若
,且对任意的正整数
,都有
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d871f2ed38cbfc144e60eb7bd02106f.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c895d4ce5ce82ef9b311b9369b4de11.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e639d8fa343b703a56997c07034086be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd624bda9f45309816fc1e6f27e42675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2016-12-04更新
|
1082次组卷
|
3卷引用:2016届吉林省吉林大学附中高三上第四次摸底理科数学试卷
解题方法
5 . 已知数列
中,
,
,记
为
的前
项的和,设
.
(1)证明:数列
是等比数列;
(2)不等式:
对于一切恒成立,求实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3033857002098ee89e0f38aa360f9f78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/314501f06c7e4bf3112fe41ecac7be68.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c251c7cd990e1682da2e5b8ca86cabcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
6 . 已知数列
中,
,
且
.
(1)证明数列
是等比数列;
(2)若
是数列
的前
项和,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65561c9a235cf5964f6e047a765ec9e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2231950b845fe2ddec5f8734bce5ce98.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9a0d7150fb24be3e28ef7f0e18be93.png)
您最近一年使用:0次
2016-12-03更新
|
1100次组卷
|
3卷引用:吉林省梅河口市第五中学2018届高三4月月考数学(文)试题
2012·吉林延边·一模
7 . 在数列
中,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab79ab622af0deecc7f146e1d8c838f3.png)
(1)求
的值;
(2)是否存在常数
,使得数列
是等比数列,若存在,求出
的值,若不存在,说明理由.
(3)设
,
,证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab79ab622af0deecc7f146e1d8c838f3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c40f927a434a9cec83068b915011b0c.png)
(2)是否存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0859fc6a3e2eecca56eee1bffe2a00ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9acabc49ff9c4126ea337704d3285da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0859fc6a3e2eecca56eee1bffe2a00ca.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2972ecf51719c40d217c769cc1cc36a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aeb6eb319ba57ca8e559e9bf216e83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ad655c8fea4bfa6b9428cd799b3e34.png)
您最近一年使用:0次
11-12高一下·吉林长春·期中
名校
8 . 已知
是等差数列
的前
项和,且
.
(1)求
;
(2)令
,计算
和
,由此推测数列
是等差数列还是等比数列,证明你的结论.
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce3ab3bfad90de88b45fc2c2be09c5b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5c1b8eb4382c751dcc16aee786e6865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bc85af36f64be115dd7c5d88fac6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57483e04fd1840c87ac5325157149877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
2016-12-01更新
|
616次组卷
|
3卷引用:2011-2012学年吉林省长春外国语学校高一下学期期中考试数学试卷
(已下线)2011-2012学年吉林省长春外国语学校高一下学期期中考试数学试卷【全国市级联考】湖南省武冈市2017-2018学年高二学考模拟数学试题黑龙江省牡丹江市第二高级中学2022-2023学年高二上学期期末数学试题
9 . 已知数列
满足
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2604d18685b720545e66bce9f631a6a9.png)
(1)证明数列
为等比数列.
(2)求数列
的通项公式
与其前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d706031555a267f866e3094d487d0037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2604d18685b720545e66bce9f631a6a9.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次