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If L1 and L2′ are regular languages, L1 ∩ (L2′ U L1′)’ will be(a) regular(b) non regular(c) may be regular(d) none of the mentionedI got this question in examination.My query is from Closure Properties under Boolean Operations in section Properties of Regular Languages of Automata Theory

Answer» RIGHT OPTION is (a) regular

Easiest EXPLANATION: If L1 is regular, so is L1′ and if L1′ and L2′ are regular so is L1′ U L2′. Further, regularlanguages are also CLOSED under intersection operation.


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