已知等比数列
的首项是1,公比为3,等差数列
的首项是
,公差为1,把
中的各项按如下规则依次插入
的每相邻两项之间,构成新数列
:
,
,
,
,
,
,
,
,
,
,…,即在
和
两项之间依次插入
中
个项,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ed0224c4aa502c52317eb04b0e7aad.png)
__________ .(用数字作答)
![](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/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.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/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57483e04fd1840c87ac5325157149877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a548938d87c80ac47910607d3857007f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f6714682274c31a328bf796e235900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64fcc69dc28bc11b22f5c9bec9e2aa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.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/d7ed0224c4aa502c52317eb04b0e7aad.png)
更新时间:2018-05-10 19:28:36
|
【知识点】 等差数列与等比数列综合应用
相似题推荐
填空题-单空题
|
较难
(0.4)
名校
【推荐1】已知数列
的前
项和为
(
),且满足
,若对
恒成立,则首项
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c905883ac4f2d3609998f76df8b66e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eedbd168618a95a85e0a4598ad914284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
您最近一年使用:0次
填空题-单空题
|
较难
(0.4)
名校
【推荐2】已知正项数列
的前n项和为
,对于任意正整数m、n及正常数q,当
时,
恒成立,若存在常数
,使得
为等差数列,则常数c的值为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4af60e70f570ec61b8170214977bc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fa1f84422606b095f31d28de57c6ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff64b05d758c9a62d64a7f7d2a3a8e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167e88bdf4608388f0bb981e78119477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6432a5e3fed32b6a725c6b4fdd746303.png)
您最近一年使用:0次