題組內容

5. The random variables X and Y have the joint probability density func tion
6350eda8265ac.jpg where -∞ ＜x＜ ∞ and -∞  ＜ y ＜ ∞ .

(d) (8%) Let Z = 3X + 2Y. Derive the moment generating function 6350ee08a2767.jpg. You have to give the derivation, not just the an- swer.