已知数列
的前
项和为
,满足:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c5d620bdc7498cff66250db633b788.png)
(1)求证:数列
为等差数列;
(2)令
,数列
的前
项和为
,若不等式
对任意
恒成立,求实数
的取值范围.
![](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/42c5d620bdc7498cff66250db633b788.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25cbe66fe4e84b4022721122baab4a3.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f052af7ec6eabf99cbea5543397cd1d5.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/b6892586ad3007e4814d2666fcc6e0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2023-04-26 20:10:02
|
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】已知等差数列
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,问是否存在最大的正整数m,使得对任意正整数n均有
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(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903edfe18445cf023deca78e59857132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aeb6eb319ba57ca8e559e9bf216e83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109881c3131b0a13850bf3cac72d314f.png)
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解答题-证明题
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适中
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解题方法
【推荐2】数列
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且
.
(1)求证:数列
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的通项公式;
(2)在
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之间插入n个数,使这
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5140ea97948f77ff1367d4dfd925d4ee.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7695d7b6905ff9d4cd9b063028cc092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0526bcbb60d5258b461ab634e913212d.png)
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【推荐1】已知正项数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
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(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e6ee78845bac6f736bc9999df3a5bc.png)
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解答题-证明题
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【推荐2】已知数列{an}的前n项和为Sn,an>0,a1<2,6Sn=(an+1)(an+2).
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您最近一年使用:0次
解答题-问答题
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【推荐1】如图1,腰长为
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的速度向右平行移动,移动过程中两图形重叠部分的面积记为
,函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/7a2dd680-18ef-4c73-8e77-103416b68217.png?resizew=426)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5451a66fb4f48811e042d8ca250f51.png)
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【推荐2】已知集合
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fc6fd32a3ed7b5be415f410fc1ce96.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d50619b779c1056602f46b2a95e90.png)
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(2)若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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1】已知等比数列
的前项和为
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7183191ac1e504d89ef9149b3c6ae5.png)
且
.
(1)求数列
的通项公式;
(2)若
,求数列
的前项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7183191ac1e504d89ef9149b3c6ae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585bc8b60be5dc33727fa0b780703025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7415b1ead4cc6ed7b015b973605a2403.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32dd77e295da8f4006e3a890828dcf9b.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
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】数列
满足
,数列
的前
项和
满足
,且
.
(1)求数列
,
的通项公式;
(2)数列
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,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92f794bdc87cb5b12f451e933d402908.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b4e688ad5156121531f6e0f4b4c1eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcf0290855e78405bec41a164c79fe2.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b227aea9ff3a8056a2fd1a415b0ee9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf87c9805be59d26f2baad7de0bd628.png)
您最近一年使用:0次