Consider a Markov chain {Xn : n = 0, 1, . . .} on the nonnegative integers such that starting from state x, the chain goes to state x + 1 with probability 0.3, and goes to state 0 with probability 0.7. (a)  Argue that this chain is irreducible. (b)  Show that the chain is recurrent. (Hint: Consider the state 0.)

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Consider a Markov chain {Xn : n = 0, 1, . . .} on the nonnegative integers such that starting from state x, the chain goes to state x + 1 with probability 0.3, and goes to state 0 with probability 0.7.
(a)  Argue that this chain is irreducible.
(b)  Show that the chain is recurrent. (Hint: Consider the state 0.)

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