若随机变量
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aee29024061a3a1c81ebfdbcf097499.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23428a5b813e05ca536d14e5338d0e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75664f9140c2f891ea5c20c495b5cc8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aee29024061a3a1c81ebfdbcf097499.png)
更新时间:2024-05-09 22:52:51
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