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Module 1: Introduction, Regular languages and finite automata

20192m

Consider the following finite state automaton:

diagram

The language accepted by this automaton is given by the regular expression
(i) b∗ab∗ab∗abb^*ab^*ab^*ab
(ii) (a+b)∗(a+b)^*
(iii) b∗a(a+b)∗b^*a(a+b)^*
(iv) b∗ab∗abb^*ab^*ab

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