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3 Answers

Best answer
9 votes
9 votes
  • ∅  U  ∅* = { } U {ϵ} = {ϵ}
  • ∅  $\cap$  ∅* = { } $\cap$ {ϵ}  = { } = ∅
  • ∅  U  ϵ* = { } U {ϵ} = {ϵ}
selected by
1 votes
1 votes
We know that,

 RE + ∅ = RE and ∅* = ϵ , RE is Regular expression

So from the given question

∅  U  ∅* which is nothing but  ∅  + ∅*

Therefore

∅  +  ϵ =  ϵ

Hence,  Option B is the correct answer. Correct me if iam Wrong.

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