Problem 3. Let A and B be sets and f : A → B a function. Show that (a) f is one-to-one if and only if ƒ-' is a functional relation. (b) f is one-to-one if and only if fofl = IRng(f) TFAT: %3D

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Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.