Let A = {1, 2, 3, 4}, B = {1, 3, 4, 8}. Let R = {x, y) : `x in A, y in B` and x divides y}. Write R in roster form.

Explanation

Given A = {1,2,3,4}, B = {1, 3, 4, 8}
`R = {(x, y) : y in A, y in B` and x divides y}
In roster form, R = {(1,1), (1, 3), (1, 4), (1, 8), (2, 4),(2, 8), (3, 3), (4, 4), (4, 8)}