已知数列
的首项
,
,对任意的
,都有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f09ee1df602ea75e1d1c47cab0bddd.png)
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd5367f5c88db960f534311d3476ef5.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6278d3cc0086c7aab6ac20712c7d0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f09ee1df602ea75e1d1c47cab0bddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcde7189db381533bc4d0e4d24e4dce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd5367f5c88db960f534311d3476ef5.png)
21-22高三上·山西运城·阶段练习 查看更多[2]
更新时间:2021-11-14 16:10:51
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相似题推荐
填空题-单空题
|
适中
(0.65)
【推荐1】在数列
中,若对任意的
,都有
(
为常数),则称数列
为比等差数列,
称为比公差.现给出以下命题:
①等比数列一定是比等数列,等差数列不一定是比等差数列;
②若数列
满足
,则数列
是比等差数列,且比公差
;
③若数列
满足
,
,
,则该数列不是比等差数列;
④若
是等差数列,
是等比数列,则数列
是比等差数列.
其中所有真命题的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5310bb9bacac1fbebec2a6a9e45348f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
①等比数列一定是比等数列,等差数列不一定是比等差数列;
②若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e57d4c0aff3bb877efc844dbaebd9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3129ddd2ea97fd010b9e0b644225da8c.png)
③若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e1ee88beaddafb0d0a185c3a8e0dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900336281b0b3b849396d9a3e2a0bfaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cad86abc322098202c6726762b1b6cc.png)
④若
![](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/aec4bdc2a6d4fc387dc621f0b5a268c5.png)
其中所有真命题的序号是
您最近一年使用:0次
填空题-单空题
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适中
(0.65)
【推荐2】规定
为数列
的一阶差分数列,其中
(
为正整数).对正整数
,规定
为
的
阶差分数列,其中
.若数列
有
,
,且满足
(
为正整数),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc0cd1b5a528a5719a29a6fa6996281.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7339c9a0a9882f0a5ce44f8ffb49b156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ffc42945d099539680d75bb54168ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8620d839ff87f2b9b00997c658bc82c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd4336e58b0bbb3dcf4202b6f7afe74.png)
![](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/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d130998a14625848172780bf5d1cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc0cd1b5a528a5719a29a6fa6996281.png)
您最近一年使用:0次
【推荐1】已知数列
中,
,
,则数列
的通项公式为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc6545b8eca1c4223ed701a199a85683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2214f2b3e99e71a55a6f5c3acffdfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐2】已知等差数列
的前
项和为
,且
,
,则使得
取最小值时的
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/25fc75492746a0a80051c0d6ae885b7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6be502c25f102f0d8092c8ad906da02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.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
|
适中
(0.65)
名校
解题方法
【推荐1】数列
的各项均为正数,其前n项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d05fbbd3ba4c2aa875cbe18fa3a32b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.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2】已知
成等差数列,将其中的两个数交换,得到的三数依次成等比数列,则
的值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5841c23b7375326b4846a02ca8265f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a51bd9b51c6c0d5ab2f79712d3b634.png)
您最近一年使用:0次