(i) R = {(1, 2), (1, 3), (2, 3), (3, 2), (4, 5)}
R–1 = {(2, 1), (3, 1), (3, 2), (2, 3), (5, 4)}
(ii) R = {(x, y) : x, y ϵ N, x + 2y = 8}.
y = \(\frac{8-x}{2}\)
Put x = 2, y = 3
Put x = 4, y = 2
Put x = 6, y = 1
R = {(2, 3), (4, 2), (6, 1)}
R–1 = {(3, 2), (2, 4), (1, 6)}