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Two players A and B toss a fair coin cyc...

Two players `A and B` toss a fair coin cyclically in the following order `A, A, B, A, A, B....` till a head shows(that is, A will be allowed first two tosses, followed by a single toss of B). Let `alpha(beta)` denote the probabilitythat `A(B)` gets the head first. Then

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