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Let A and B be non empty sets. Consider the function f: AxB -> A given by f(a,b) = a. When is f surjective? When is f injective? Prove?

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  • Let A and B be non empty sets. Consider the function f: AxB -> A given by f(a,b) = a. When is f surjective? When is f injective? Prove?


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