<p>设随机变量石的概率密度为<img data-cke-saved-src="https://learnfile.20230611.cn/img/2019052513573824d08ac09e6035af05188f7a8ffb2307.png" src="https://learnfile.20230611.cn/learnAppQuestion/c1/98/c198244c8ea3a3e039d5b72c2c74fa3a.png" style="width: 100%;height: a - 概率论与数理统计（二）(02197)