阿摩線上測驗
登入
阿摩線上測驗
登入
1.(20%) For a random variable x defined on the real number line, denote its probability density function and cumulative distribution function as f(x) and Fx(a), respectively. By definition, 
and the expectation of any function g(x) can be derived as
da. Prove that 
(Hint: you can consider to change the order of integration.) ifn-x＜0