Question

Let l be a regular language. Consider the constructions on l below: repeat (l) = {ww | w l} prefix (l) = {u | v : uv l} suffix (l) = {v | u uv l} half (l) = {u | v : | v | = | u | and uv l} which of the constructions could lead to a non-regular language? (a) both i and iv (b) only i (c) only iv (d) both ii and iii

Answer 1

Answer:

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