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. State whether f is one-one or not.
Given:-
(i) A = {1, 2, 3}
(ii) B = {4, 5, 6, 7}
(iii) f = {(1, 4), (2, 5), (3, 6)}
each element has a unique image
hence ,f is one-one