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it necessarily true that Lj is a determinisuc context-ree lalnguage 2. Is 17. Show that the language L = {anb: n 20, n is not

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it necessarily true that Lj is a determinisuc context-ree lalnguage 2. Is 17. Show that the language L = {anb": n 20, n is not a multiple of 5} is context-free. 18. Show that the following language is context-free. L-w e fa, b na (w)-nb (w); w does not contain a substring aab) 19. Is the family of deterministic context-free languages closed under homomorphism

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