<p>设随机变量X与Y相互独立，X和Y的概率密度分别为<img alt="" width="152" height="56" src="https://learnfile.20230611.cn/learnAppQuestion/73/44/7344556ce33b5235cd27dce27701f26d.png" style="width: 100%;height: auto;"><img alt="" width="156" height="55" src="https://learnfil - 概率论与数理统计（经管类）(04183)