Answer :

It is given that A = {1, 2, 3}, B = {4, 5, 6, 7}

f: A B is defined as f = {(1, 4), (2, 5), (3, 6)}


Therefore, f(1) = 4, f(2) = 5, f(3) = 6


We can see that the images of distinct elements of A under f are distinct.


Therefore, function f is one- one.


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