Given A = {2, 3, 4}, B = {2, 5, 6, 7}.

Construct an example of each of the following:

an injective mapping from A to B

Dear Student
It is given that
A = {2, 3, 4} and B = {2, 5, 6, 7}
Let f: A → B denote a mapping

f = {(x, y): y = x + 3} or

f = {(2, 5), (3, 6), (4, 7)},
which is obviously an injective mapping.


Thanks