阿摩線上測驗
The joint pdf of the two continuous random variables X and Y is given by 
for
0
if it exists. Using the moment-generating function, compute E(X), E(X), and
Cov(X,Y)
The joint pdf of the two continuous random variables X and Y is given by for
0
if it exists. Using the moment-generating function, compute E(X), E(X), and
Cov(X,Y)