名校
1 . 设数列
的各项均为正数,且
其中
为正的实常数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b672d2f7e5650115f7888d0fb479a1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/567a8796bff7661644e2222184432467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b672d2f7e5650115f7888d0fb479a1d.png)
A.81 | B.64 | C.48 | D.32 |
您最近一年使用:0次
2017-09-03更新
|
447次组卷
|
2卷引用:福建省福州市第一中学2018届高三上学期期中考试数学(文)试题
14-15高二上·福建泉州·阶段练习
2 . 设数列
满足
且![](https://img.xkw.com/dksih/QBM/2015/3/6/1571991824965632/1571991831044096/STEM/645466b4258045d38a221d0208656de5.png)
(1)求
的通项公式;
(2)设
,记数列
的前n项和为
,证明
.
![](https://img.xkw.com/dksih/QBM/2015/3/6/1571991824965632/1571991831044096/STEM/a17e5707426a4b03aa939079aa5faeee.png)
![](https://img.xkw.com/dksih/QBM/2015/3/6/1571991824965632/1571991831044096/STEM/a580f02bae02486d9c0af222719a72c5.png)
![](https://img.xkw.com/dksih/QBM/2015/3/6/1571991824965632/1571991831044096/STEM/645466b4258045d38a221d0208656de5.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2015/3/6/1571991824965632/1571991831044096/STEM/a17e5707426a4b03aa939079aa5faeee.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649bef7505f1c29d76cbfe360629ffe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70cb7b6d14630288595af4d9ad841312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457e09a0f5d4ce3bb17b5057f3b6bce7.png)
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11-12高三上·福建三明·阶段练习
3 . 已知等差数列{
}前
项和为
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395d0c8bb0dbae01c900e92ce5ed81f8.png)
(Ⅰ)求数列
的通项公式
(Ⅱ)若
,求数列
的前
项和
![](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/395d0c8bb0dbae01c900e92ce5ed81f8.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbc51ee42de86309f1bc86feae82999.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)
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4 . 如果数列
对于任意
,
,有
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7f935ae4d7aea65c3299d58b918fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2810a7bc4b4d2608fbed9f4f7a80e4e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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解题方法
5 . 已知数列
的各项均为正数,
,
,若数列
的前
项和为5,则![](https://img.xkw.com/dksih/QBM/2016/7/1/1572862816256000/1572862822244352/STEM/f3a758d43d19494fa45d0f16f1397d80.png?resizew=25)
_______ .
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572862816256000/1572862822244352/STEM/09edbc1c8bff418998cb53d24e8b24a9.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572862816256000/1572862822244352/STEM/7343699adc1d4f79ab512e2dcacc41c8.png?resizew=41)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572862816256000/1572862822244352/STEM/cb148ed4f90e48519073ec53ab3f1451.png?resizew=129)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572862816256000/1572862822244352/STEM/3a55c4e0196441beae5bfdc28cd58e67.png?resizew=72)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572862816256000/1572862822244352/STEM/cfa07bb44e5944d98fed9e9a0e5d0c33.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572862816256000/1572862822244352/STEM/f3a758d43d19494fa45d0f16f1397d80.png?resizew=25)
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10-11高一下·福建三明·阶段练习
6 . 已知函数
对任意实数
都满足条件
①
,且
,和②
,且
,
(
为正整数)
(Ⅰ)求数列
的通项公式;
(II)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0ed188d083966baaae94e6b86064f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c29d537b324432e569410be56b8791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bec9bd84c584a3dcce8bdeac165a6e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332cc38a1b7b52d6a0c05e08673a718e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e368a59560bce43ee0d6ea0e441702ef.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881893c4e6443a9f5a79a835102f22a4.png)
(II)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18cc0afd3e78641a7137d314230c715f.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
9-10高二下·河北·期末
7 . 等差数列
的前
项和为
,那么
值的是( )
![](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/6ecfb810cef755814084384b294c2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f907d998b6ca7466948ab5a7ff76c.png)
A.130 | B.65 | C.70 | D.以上都不对 |
您最近一年使用:0次
11-12高三上·福建厦门·阶段练习
8 . 已知数列
是公比为
的等比数列,且
成等差数列.
(Ⅰ) 求
的值;
(Ⅱ) 设数列
是以2为首项,
为公差的等差数列,其前
项和为
,
试比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa26c38c283ed8c2ca2b093861f09e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2737a25dad0a5f4c99202453bcc8f906.png)
(Ⅰ) 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(Ⅱ) 设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
试比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
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