Answer: In each of 20–29, (a) design an automaton with the
Chapter 12, Problem 21E(choose chapter or problem)
Problem 21E
In each of 20–29, (a) design an automaton with the given input alphabet that accepts the given set of strings, and (b) find a regular expression that defines the language accepted by the automaton.
Input alphabet = {a, b}; Accepts the set of all strings of length at least 2 for which the final two input symbols are the same.
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