Question

(a+b)* is equivalent to

(a) b*a*

(b) (a*b*)*

(c) a*b*

(d) none of the mentioned

This question was addressed to me in exam.

The origin of the question is Regular Language & Expression topic in section Regular Expressions and Languages of Automata Theory

Answer 1

Right choice is (b) (a*b*)*

For explanation I would say: None.