Question: 2.2.7. Simplify: (c) (ab)* U (b*a) (d) (a Ub) a(a U b) 2.2.8. Show that (aa)'a a(aa)'. 2.2.9. Simplify the following regular expressions. (a) (????)*

2.2.7. Simplify: (c) (a"b)* U (b*a) (d) (a Ub) a(a U

2.2.7. Simplify: (c) (a"b)* U (b*a) (d) (a Ub) a(a U b) 2.2.8. Show that (aa)'a a(aa)'. 2.2.9. Simplify the following regular expressions. (a) (????)* (b) (????)(EUaa)" (c) a (EU aa)"aUe (e) (a UE)a b (h) (EU aa) (? U aa)* (ab U b) U (ab U b) (G) (a Ub)(e Uaa) (e U aa) U (a U b) (k) a*b((a U b)a" b)* U a*b

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