Question: 3.28. Let A and B be nonempty sets. Prove that a function f: A ? B is bijective if and only if there exists a

3.28. Let A and B be nonempty sets. Prove that a

3.28. Let A and B be nonempty sets. Prove that a function f: A ? B is bijective if and only if there exists a function g: B-> A such that gof- iA and fog _

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