名校
解题方法
1 . 对于数列
,若
,则称数列
为“广义递增数列”,若
,则称数列
为“广义递减数列”,否则称数列
为“摆动数列”.已知数列
共4项,且
,则数列
是摆动数列的概率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb2fecac23d1f38bca02feba460a1a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf26d56d800370a7aa5a9ad8af19ab40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0da8dfdac6a516c744a2cda9e54c2e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
名校
2 . 已知二进制和十进制可以相互转化,例如
,则十进制数89转化为二进制数为
.将
对应的二进制数中0的个数,记为
(例如:
,
,
,则
,
,
),记
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a264948c768a250404d1cbbbfffc433.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048e0e93e4f2c324160c032a96a8c2be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084c0570dc21c7107ce53309533cf95e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/440a7c6e674e9736936b3a81aec830c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6496481fec463fdf799c29347b37f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e5e8702525913045c7ced4ce46d697f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d77060931748cee8c21b43d15033b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20509cff32749ebc22bb2640959ac6d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/521f0256a6cfba8ae4a2d0b9b3d4adec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d362d1f0a28b5aac138d019cec83fe91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a264948c768a250404d1cbbbfffc433.png)
您最近一年使用:0次