已知数列
的前
项和为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5eb9b8f893dd71876349ad40724550.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1ffec65606db39ef911662d63fc4ad3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5eb9b8f893dd71876349ad40724550.png)
2023·全国·模拟预测 查看更多[2]
更新时间:2023-05-01 22:31:14
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相似题推荐
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】设数列
是以2为首项,1为公差的等差数列,
是以1为首项,2为公比的等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5730920ee88823a48efcc84c442b58d7.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/5730920ee88823a48efcc84c442b58d7.png)
您最近一年使用:0次
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适中
(0.65)
解题方法
【推荐2】已知等比数列
的前n项和为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
__________ .
![](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/7b28de39ed3f08c49771aa7f79d2113f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
您最近一年使用:0次
【推荐1】已知数列
满足:
,设
,
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045e4d6ebd7f891ca14758af887c5b90.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03aa2a3fafc45173184e2fbd83c05b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee1d480f5061015cb0232f975eafdef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045e4d6ebd7f891ca14758af887c5b90.png)
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名校
【推荐2】在数列
中,
,
,曲线
在点
处的切线经过点
,下列四个结论:①
;②
;③
;④数列
是等比数列;其中所有正确结论的编号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa01f03fb074bff35b35e07047d11b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c904567c3b3734e1eca8d042ef7a7b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd02ae214ee6ddad0773a000327baf0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5aa6d8c9a4546de6cdf9b8c0190a71b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb826b0eee0ec278a944d5c78685c050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ad8f29672ebb40d03b38c2313ab064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c634e4e87e77184973dc74f44be526e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】记
为数列
的前n项和,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.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/f90f10c2f8be13bbab9f7c0090df558e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
填空题-单空题
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适中
(0.65)
解题方法
【推荐2】已知等比数列{an}的前n项和为Sn,且
,则实数
的值为_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3330ec514adf2edc243f5df1d000f534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】设数列
的前n项和为
,且
为等差数列,则
__ .
![](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/332cf97e9a59ddf62809fa2225b6848e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679401be6da078a518f95f9211dff17b.png)
您最近一年使用:0次
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解题方法
【推荐2】著名科学家牛顿用“作切线”的方法求函数的零点时,给出了“牛顿数列”,它在航空航天中应用广泛.其定义是:对于函数
,若数列
满足
,则称数列
为“牛顿数列”.已知函数
,数列
为“牛顿数列”,
,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33610d2a46105e3c8456257221d3d07b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f496911266e86ff15d128b01657838cd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/346549f9adda7eb363f16d355ae68b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
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