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Concatenation of R with Ф outputs:

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in Automata Theory by (51.1k points)
Concatenation of R with Ф outputs:

(a) R

(b) Ф

(c) R.Ф

(d) None of the mentioned

The question was posed to me by my college director while I was bunking the class.

My doubt is from Regular Expression-Introduction in portion Regular Expressions and Languages of Automata Theory

1 Answer

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Best answer
Correct option is (b) Ф

Easiest explanation: By distributive property (Regular expression identities), we can prove the given identity to be Ф.

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