Question: Show that the class P , viewed as a class of languages, is closed under union, intersection, concatenation, complement, and Kleene closure. That is ,

Show that the class P, viewed as a class of languages, is closed under union,
intersection, concatenation, complement, and Kleene closure. That is, if A, B 2 P, then
A [ B 2 P, A \ B 2 P, AB 2 P, A 2 P and A2 P.

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