Regular expressions

Question

→ Let LA = ab*a and LB = b*a. Let LA / LB = {x | xy∈ LA for some y ∈ LB}, then LA / LBis:

1.a

2.None of these.

3. ab*

4.ab*a

Comments

3), ab* is correct answer

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Oh yes 😐

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@Hardik Vagadia ab* As u r saying 'a' is valid answerl yup it is one of possible outcome which is already in ab* when no b i.e ab0=a.so ab*

Answer 1

ab*