<p>设随机变量X与Y相互独立，且二维随机变量（X，Y）概率密度为<img alt="" width="301" height="57" src="https://learnfile.20230611.cn/learnAppQuestion/05/41/0541e2db3fee748393821f9443bdbee4.png" style="width: 100%;height: auto;">则当<img alt="" width="71" height="22" src="https://l - 概率论与数理统计（经管类）(04183)