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If L is a regular language, then (L’)’ U L will be :

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in Automata Theory by (51.1k points)
If L is a regular language, then (L’)’ U L will be :

(a) L

(b) L’

(c) f

(d) none of the mentioned

I had been asked this question during a job interview.

The above asked question is from Closure Properties under Boolean Operations topic in section Properties of Regular Languages of Automata Theory

1 Answer

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Best answer
The correct option is (a) L

Explanation: (L’)’ is equivalent to L and L U L is subsequently equivalent to L.

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