<p>设随机变量X的概率密度为 <img src="https://learnfile.20230611.cn/learnAppQuestion/68/ac/68ac20277c0779890926c20d05c0bec1.jpg" style="width: 100%;height: auto;"><img src="https://learnfile.20230611.cn/learnAppQuestion/d6/54/d65447406a17ca679c36137573afee4e.jpg