Question: Prove that for all sets S, (i) (S + )* = (S*)* (ii) (S + ) + = S + (iii) Is (S*) + =

Prove that for all sets S,
(i) (S+)* = (S*)*
(ii) (S+)+ = S+
(iii) Is (S*)+ = (S+)* for all sets S?

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