question_answer 22)

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. 

Answer:

A = {1, 2, 3}, B = {3, 5, 6, 7}       F = {(1, 4), (2, 5), (3, 6)}              Different elements of domain have different f-image in the range.        is one-one.