随机变量
的分布列如图,且
,
,
成等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ee84b80b472621b95e6b160e645261.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ee84b80b472621b95e6b160e645261.png)
-1 | 0 | 1 | |
21-22高二下·山东青岛·阶段练习 查看更多[3]
更新时间:2022-06-10 12:42:00
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