Question: 22. For nonempty sets A, B and C, let f: A-B and g : BC be functions. Prove that if gof is one-to-one, then f

22. For nonempty sets A, B and C, let f: A-B

22. For nonempty sets A, B and C, let f: A-B and g : BC be functions. Prove that if gof is one-to-one, then f is one-to-one

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