Question: Suppose that the random variables X and Y are i.i.d. and that the m.g.f. of each is (t) = et2+3t for < t <

Suppose that the random variables X and Y are i.i.d. and that the m.g.f. of each is
ψ(t) = et2+3t for −∞ < t < ∞.
Find the m.g.f. of Z = 2X − 3Y + 4.

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