数列
是正整数
的任一排列,且同时满足以下两个条件:
①
;②当
时,
记这样的数列个数为
.
(1)写出
的值;
(2)证明
不能被4整除.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91241bd4e890e5876ad21fb8aafe1eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf01a2bcee46603a35afe6375e473df.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cced9f61b6984b4f6ac875f368a1414d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4fc8faefb26b233d4aa9dbef043aae.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e565b629c1cde32e9b627ef6b954d4.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338326674cfb0887c21997a738905132.png)
更新时间:2017-12-29 17:38:12
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】对任意函数
,
,可按如图所示的程序框图构造一个数列发生器,记由数列发生器产生数列
,
.
![](https://img.xkw.com/dksih/QBM/2018/7/1/1978897511047168/1980826815930368/STEM/1e519493e52c4cb4b49546797fd76e2b.png?resizew=137)
(Ⅰ)若定义函数
,且输入
,请写出数列
的所有项;
(Ⅱ)若定义函数
,且输入
,求数列
的通项公式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02cab1add26335b3cb43d5b54c7c853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086e9b14c35ef3c57b20f5e952ebf9c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://img.xkw.com/dksih/QBM/2018/7/1/1978897511047168/1980826815930368/STEM/1e519493e52c4cb4b49546797fd76e2b.png?resizew=137)
(Ⅰ)若定义函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e490183508c26fce6551832bf084d9fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c861e3728c51f2f447c24880cb7f0f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086e9b14c35ef3c57b20f5e952ebf9c8.png)
(Ⅱ)若定义函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be01f5cb16c638ab48e5180c684d5ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5603d29560e66b2293cea1e3b02289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086e9b14c35ef3c57b20f5e952ebf9c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】已知数列{
}的首项
.
(1)求数列{
}的通项公式;
(2)求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925f52e9e8f9143a737f9d9edfc72325.png)
(1)求数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27281b55e46e55c997e18c2add9e0a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】记
,若
是等差数列,则称
为数列
的“
等差均值”;若
是等比数列,则称
为数列
的“
等比均值”.已知数列
的“
等差均值”为2,数列
的“
等比均值”为3.记
,数列
的前
项和为
.
(1)求数列
,
的通项公式;
(2)若对任意的正整数
都有
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7f39f5cf84c5a5df31d7d752b6e70e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e260b088f071983f254ce8f5163fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e260b088f071983f254ce8f5163fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627a57cd9fdb1f586f35d9825b6bcc0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ddcb15eb419ed659536e1385b09af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a788386a548bd699196e4c15faba2f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若对任意的正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ce63c6e8f836093978981aa401649d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】对于给定的正整数k,若数列
满足:
,对任意正整数
总成立,则称数列
是“P(k)数列”.若数列{an}既是“P(2)数列”,又是“P(3)数列”,证明:
是等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da32a848abcb5c46ac0e9d1ed7f9695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ddb1294ab81b06f260fa8a40b7a1fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次