Question

Let R be the relation from A = {1, 2, 3, 4} to

B={ 1, 2, 5}, R is the set of ordered pairs and find 1 R​

Answer 1

R={(1,1),(1,2),(1,5),(2,1),(2,2),(2,5),(3,1),(3,2),(3,5),(4,1),(4,2),(4,5)}