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Let A = {1, 2, 3}, B = {4, 5, 6, 7}and l...

Let `A = {1, 2, 3}`, `B = {4, 5, 6, 7}`and let `f = {(1, 4), (2, 5), (3, 6)}`be a function from A to B. Show that f is one-one.

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