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please use the hints to solve the question


3. Let X be an integer-valued RV with PGF P(s), and suppose that the MGF M(s) exists for s € (-30, so), 50 > 0. How are M(s)

Hints: The first part is to show that M(s) = Ple) or something like this. The second part uses the kth derivatives: EX* = M*

Hints MCs) = Elest p(s) E(S) MC?)=P(S) p(?) M(S)] che MCs) met P CPJ ofs
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