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2.6.4. A discrete random variable X is such that 2n-1 P(X = n) =-, n=1.2, . . . , n, . . . . Il Show that EX- 3. 2.6.5. A discrete random variable X is such that P(X=2) = 1 2 n=1.2, . , show that EX = oo. That is, X has no mathematical expectation.

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