2011·浙江绍兴·一模
1 .
对任意
都有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c6e95c91df22486cca4c19ce994fd9.png)
(Ⅰ)求
和
的值.
(Ⅱ)数列
满足:
,数列
是等差数列吗?请给予证明;
(Ⅲ)令
试比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c6e95c91df22486cca4c19ce994fd9.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ceb86a2bebabdcf5e8beebf3f98fed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eea4e071d8a790b9f2cd9b2c40d379b5.png)
(Ⅱ)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c8fd3a337838203af97e0fd1ac7e60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅲ)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765f9c4f5269b914ae40e07edd19b183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2016-11-30更新
|
748次组卷
|
4卷引用:2013届河北省保定市唐县一中高三下学期第二次摸底考试数学试卷
(已下线)2013届河北省保定市唐县一中高三下学期第二次摸底考试数学试卷(已下线)2011届浙江省绍兴一中高三下学期回头考试数学文卷广东省深圳市2018届高考模拟测试数学试题第四届高一试题(决赛)-“枫叶新希望杯”全国数学大赛真题解析(高中版)
11-12高一下·河北唐山·期中
名校
2 . 数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8529167c0137199b00c5270067a806.png)
(1)设
,求证
是等比数列;(2) 求数列
的通项公式;
(3)设
,数列
的前
项和为
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8529167c0137199b00c5270067a806.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd9118f8d60f5a8706ab4fd00b1b9104.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ef8539a7a09303a95b4e79fb9949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c5f9dbd0bac1a171cba319b4f83684.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/4ff2fd8f9ab900ee8143345377d764f0.png)
您最近一年使用:0次
2016-12-01更新
|
1032次组卷
|
3卷引用:2011-2012学年河北省唐山一中高一下学期期中数学试卷
(已下线)2011-2012学年河北省唐山一中高一下学期期中数学试卷2014-2015学年河北省正定中学高一下学期期末考试数学试卷广东省中山市第一中学2019-2020学年高二上学期11月月考数学试题
名校
3 . 已知等差数列
的公差
它的前
项和为
,若
且
成等比数列.
(1)求数列
的通项公式;
(2)设数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2da4105d60208e79df41a22987ba35.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/63ded6901d7b1e7dde28be1e676885a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea68ba197cb8727562208a44d36e8144.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051e50e9a3fb2a8c63e171eaed229b2d.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/64fe8499fbfb72cc31413a9148e6cf31.png)
您最近一年使用:0次
2016-12-03更新
|
1461次组卷
|
5卷引用:河北省冀州中学2021届高三上学期第二次月考数学试题
12-13高一下·河北石家庄·期中
4 . 已知
,点
在函数
的图像上,其中
.
(1)证明:数列
是等比数列;
(2)记
,求数列
的前项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44042d110ad8bf676c2785c2b1f9a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becd598a11b876d858728161a7a09705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136eaf36d164bf5ac378a4401c25263b.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad75f8318b09f86fdd2af419e86ee291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2012·河北衡水·一模
5 . 设函数
,已知
不论为何实数时,恒有
,对于正数数列
,其前项和
(
)
(1)求
的值;
(2)求数列
的通项公式;
(3)是否存在等比数列
,使得
对一切正整数
都成立,并证明你的结论;
(4)若
,且数列
的前
项和为
,比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe34f38a2d41c80eaaa11e72c19ca0e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1c8146d084248c9c65dd8a11801905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab6a35c9cf045a72fe95a754eefd3b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1295d2b293281e1553ff6d8b53befeba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851c8763f6700bccac95949fc0d316f7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(3)是否存在等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c695906fad9c6c679695774f7504e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a60bd376464f04798c535afadbe7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
您最近一年使用:0次
2011·河北唐山·一模
6 . 在数列
中,已知
且
.
(1)记
证明:数列
是等差数列,并求数列
的通项公式;
(2)设
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950594194f4cd62466e29b190e6824dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75131ee2ef61c411b4e1f8a52fedcdd4.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2235454964de65765195c706b1478a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84cd5674e88b20b204dea6f0795a9d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09a9bb8b430934d5166f0657acc75e6.png)
您最近一年使用:0次
解题方法
7 . 设等差数列
的前
项和为
.且
.
(1)求数列
的通项公式;
(2)令
,数列
的前
项和
,证明:对任意
,都有
.
![](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/cb6729e3fed1afd45e8b52bfa8fee8bb.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b11849b4064846173587dda13276dda.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/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3b251e07a6f3d915290b1fe52e1654.png)
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