Question: For = {x, y, z}, let A, B * be given by A = {xy} and B = {, x}. Determine (a) AB;

For ∑ = {x, y, z}, let A, B ⊂ ∑* be given by A = {xy} and B = {λ, x}. Determine (a) AB; (b) BA; (c) B3; (d) B+; (e) A*.

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