# Question: A pair of random variables has a joint characteristic function

A pair of random variables has a joint characteristic function given by

(a) Find E [X] and E [Y]

(b) Find E [XY] and Cov (X, Y).

(c) Find E [X2Y2] and E [XY3].

(a) Find E [X] and E [Y]

(b) Find E [XY] and Cov (X, Y).

(c) Find E [X2Y2] and E [XY3].

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