Question: can you help me solve this question? 3. (20pts) Let X, y be independent random variables with common pdf f(r) = e- (a > 0).

can you help me solve this question?

can you help me solve this question? 3. (20pts) Let X, y

3. (20pts) Let X, y be independent random variables with common pdf f(r) = e- (a > 0). Find the joint pdf of U = X + Y

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