Question: Prove that a language A is decidable (Recursive) if and only if it is finite or there is a computable function such that range(f) =

Prove that a language A is decidable (Recursive) if and only if it is finite or there is a computable function such that range(f) = A and each f(n) comes strictly before f(n+1) in the standard enumeration of {0,1}*

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