已知数列
,
,
为数列
的前n项和,
,若
,
,且
,
.
(1)求数列
的通项公式;
(2)若数列
的通项公式为
,令
为
的前n项的和,求
.
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b218506294c4c004eb96de84d0bc1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0505be84bc168fe9dd19679bc63ce44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b8e4cd76bd8f9f36dc43bfc4a9a392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d9d6830871f943f7c94cef450ae0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
21-22高三下·湖南常德·阶段练习 查看更多[2]
更新时间:2023-05-28 18:25:05
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相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】
为数列{
}的前
项和.已知
,
.
(1)求{
}的通项公式;
(2)设
,求数列{
}的前
项和
;
(3)在(2)的条件下,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.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/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f0c5074d80d4cd643286067f21a434a.png)
(1)求{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8107120e073023ad75e7eaaddb1636e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)在(2)的条件下,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5608d0c8d3b5b997012cb6dc698d9f4.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】设数列
的前
项和为
,已知![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/2f86721592834a2c8fa6e6a6408e1013.png?resizew=252)
(Ⅰ)求证:数列
为等差数列,并写出
关于
的表达式;
(Ⅱ)若数列
前
项和为
,问满足
的最小正整数
是多少?
![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/4a8681315d0245278303890c532e96c1.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/a076a87cc41741d5a4fbbacc07e93303.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/5b024aceef3b435c9bb4c968d6783041.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/2f86721592834a2c8fa6e6a6408e1013.png?resizew=252)
(Ⅰ)求证:数列
![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/c2de330e694b493b82f8c6c4fc91c0c7.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/1a00da074f784f67b663d3f963ee4a59.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/a076a87cc41741d5a4fbbacc07e93303.png?resizew=13)
(Ⅱ)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba57c83d526ac308d1461e80fcca9f36.png)
![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/a076a87cc41741d5a4fbbacc07e93303.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/eadc4d626d1547db83a1a45122e7e98d.png?resizew=17)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ce57e19ffb9e6db6d2ce9caa8fe977.png)
![](https://img.xkw.com/dksih/QBM/2012/10/18/1571028585603072/1571028591263744/STEM/a076a87cc41741d5a4fbbacc07e93303.png?resizew=13)
您最近一年使用:0次
解答题-应用题
|
适中
(0.65)
真题
【推荐1】 某国采用养老储备金制度.公民在就业的第一年就交纳养老储备金,数目为a1,以后每年交纳的数目均比上一年增加d(d>0),因此,历年所交纳的储务金数目a1,a2,…是一个公差为d的等差数列,与此同时,国家给予优惠的计息政策,不仅采用固定利率,而且计算复利.这就是说,如果固定年利率为r(r>0),那么,在第n年末,第一年所交纳的储备金就变为a1(1+r)a-1,第二年所交纳的储备金就变为a2(1+r)a-2,……,以Tn表示到第n年末所累计的储备金总额.
(Ⅰ)写出Tn与Tn-1(n≥2)的递推关系式;
(Ⅱ)求证:Tn=An+Bn,其中{An}是一个等比数列,{Bn}是一个等差数列.
(Ⅰ)写出Tn与Tn-1(n≥2)的递推关系式;
(Ⅱ)求证:Tn=An+Bn,其中{An}是一个等比数列,{Bn}是一个等差数列.
您最近一年使用:0次
【推荐2】已知数列
满足
,数列
满足
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f554af0e0b3b42786ca7a3bfec2490.png)
(1)求数列
和
的通项公式;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffb3518bca5f88605691f7c909183450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80115717952b0dc7d2f0848dee4d4e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f554af0e0b3b42786ca7a3bfec2490.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.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
【推荐1】设数列
的前
项和为
,且
,
,数列
满足
,点
在直线
上,
.
(1)求数列
,
的通项公式;
(2)记
,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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaedaa6a265377ba21daff547870267b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89fe0f4e8a80a2840c0f6929a8a6351b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ca2c0683b40ff13a9770d2355c61b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23fc11a3a7592c68b20f93bdde2ed3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0e0aedf1849599e5b9970c44923419.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ef8539a7a09303a95b4e79fb9949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐2】数列
满足
,
,
(1)求数列
的通项公式;
(2)记
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a849f584b16a831e8959437bb4b9134b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf263f6ca69643a5211a5cccb587490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次