Probability generating function
A certain discrete random variable has probability generating function
px(q) = (1/3) (2 +q)/(2-q)
Compare p(x) for x = 0, 1, 2, 3, 4, 5 (formula for summing a geometric series helps)
Find E(x) and Var(x).
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A system is transformed for state A to state B, rising its internal energy by 4x10^4 Joules while 6.0x10^4 Joules of heat is added. The System is then returned to the State A While 3x10^4 Joules of heat is taken away. i) Determine the work done by
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