Peter Linz Edition 4 Exercise 4.1 Question 5 (Page No. 109)
Show that the family of regular languages is closed under finite union and intersection, that is, if $L_1,L_2,…, L_n$ are regular, then $L_U=\bigcup_{i=1,2,..,n}$L_i$ and $L_I=\bigcap_{i=1,2,3,...,n}L_i$ are also regular.
Show that the family of regular languages is closed under finite union and intersection, that is, if $L_1,L_2,…, L_n$ are regular, then $L_U=\bigcup_{i=1,2,.....