First, of all, forgive my English terminology. If you need any clarification let me know.
I do understand how E[X+Y] is calculated into E[X]+E[Y], but I'm having trouble when it is ^3.
Also, how can I find φ(x+y)(t)?
2026-04-13 12:05:49.1776081949
E[(X+Y)^3], where X follows exponential distribution with a, and Y follows exponential distribution with b.
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