设数列
的各项均为正数,前
项和为
,对于任意的
和
的等差中项为
.①若
,则
的表达式为__________ .②设数列
的前
项和为
,且
,若对任意的实数
(
为自然对数的底数)和任意正整数
,总有
),则
的最小值为__________ .
![](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/232862ec23ce08c2dc3b13f54db0043d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5deda1cd6fa436beb194738f75ee1650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f501f68dd838d06770bef9f44f7dee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.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/afacba8ae18a6b27123757f94bac2a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd72d4b272644ebb1cd0e60db40c0a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd170b6f2c9e4d4d0135385d346c61a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
更新时间:2022-11-05 16:48:47
|
相似题推荐
填空题-单空题
|
较难
(0.4)
名校
【推荐1】已知无穷等比数列
的各项和为2,平面内有三个不同点
共线,O为坐标原点,且满足等式
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adaf6b092b3970a43bb775dbb50f1282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
您最近一年使用:0次
填空题-双空题
|
较难
(0.4)
名校
解题方法
【推荐2】我国古代名著《庄子•天下篇》中有一句名言“一尺之棰,日取其半,万世不竭”,其意思为:一尺的木棍,每天截取一半,永远都截不完.已知长度为
的线段
,取
的中点
,以
为边作等边三角形(如图1),该等边三角形的面积为
,再取
的中点
,以
为边作等边三角形(如图2),图2中所有的等边三角形的面积之和为
,以此类推,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef354e5c5ff828cc8d27c71badd40f98.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e73abc8dc057603422c192d530e244d.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/566b349adddfbd4144f0ecf7a13b05bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1703c824a1b95043221acc63daabe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df1d9b712b639c8b6809c9f3ae03706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dedd84baa5219a2af415be51947c301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef354e5c5ff828cc8d27c71badd40f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e73abc8dc057603422c192d530e244d.png)
您最近一年使用:0次
【推荐1】已知数列
的前n项和为
,满足
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
___________ ;设
,则数列
的前n项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.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/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c23164d81289e3d9b0a516e8b329d804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
![](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/7978d7bd6f6caf9ac9837ffce5f89654.png)
您最近一年使用:0次
填空题-单空题
|
较难
(0.4)
【推荐2】已知
,记数列
的前n项和为
,且对于任意的
,
,则实数t的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff1c33b81ac2f065d37faef37504bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba57c83d526ac308d1461e80fcca9f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/101323058d3c27b8570d6387ad23b8b8.png)
您最近一年使用:0次
填空题-单空题
|
较难
(0.4)
名校
解题方法
【推荐1】已知正项数列
的前
项和为
,若
,
,数列
的前
项和为
,则下列结论正确的是______ .
①
;②
是等差数列;③
;④满足
的
的最小正整数为10.
![](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/9b5ffc469770196dfb877f6ebfbaf56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c5173d9e7635b9c2ce011bcbe9c5171.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)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a5945ce5c2114af8c18718ca8dc899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8dfb2af5bfd44046042a50e6edc1c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524a82dde68aa430b8da099ef86e3898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb58fa99629a946830b97e085766242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
填空题-单空题
|
较难
(0.4)
解题方法
【推荐2】已知数列
和正项数列
,其中
,且满足
,数列
的前n项和为
,记
,满足
.对于某个给定
或
的值,则下列结论中:①
;②
;③若
,则数列
单调递增;④若
,则数列
从第二项起单调递增.其中正确命题的序号为______ .
![](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/78b52c1e5e441410c43b2d30d0e9080e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c0a953fe3428caca3e32f306f97f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51d582a3aea09c5ef593feb710d9e65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3233aed23bd3a029d445d275111b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485730913ec2af55025671d69267182c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7492975ca65036d5065a6637ede730e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d122408a30c563852b1defa57a4d15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e851326ee1c71eb79b3707554ddbc0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c3d090f557cf0937d6dbddee690c22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b54584544a6b9fae67a5a4d7fb4fe50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51d582a3aea09c5ef593feb710d9e65.png)
您最近一年使用:0次
填空题-双空题
|
较难
(0.4)
解题方法
【推荐1】已知数列
的各项都是正数,
,若数列
为严格增数列,则首项
的取值范围是______ ,当
时,记
,若
,则整数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99efc15c738a1f92085ef110bda7cf99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352d9b76dcf639368fa68cae70149802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19eb5f37c69d543198d1a4bd1fdba8c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5038a0d5cb76f15c1122ec02aabd2b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
您最近一年使用:0次
填空题-单空题
|
较难
(0.4)
名校
解题方法
【推荐2】对于数列
,定义
为数列
的“加权和”,已知某数列
的“加权和”
,记数列
的前n项和为
,若
对任意的
恒成立,则实数p的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd85a0ac7f7884ab723cfbe7b600684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf2a0b2082c017897fa25db1476f198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94592f4c368e38ec045e6fee449218f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edbb0cfb0e5d5b41fdf2bf6787e425c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
您最近一年使用:0次