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Question

Which of the following statements is not correct?

a.

Every recursive language is recursively enumerable.

b.

L = {0^n 1^n 0^n | n=1, 2 , 3, ....} is recursively enumerable.

c.

Recursive languages are closed under intersection.

d.

Recursive languages are not closed under intersection.

Answer: (d).Recursive languages are not closed under intersection.

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