1.

Consider three sets A = {1, 2, 3}, B = {3, 4, 5, 6}, C = {6, 7, 8, 9}. R_(1) is defined from A to B such that R_(1) = {(x, y) : 4x lt y, x in A, y in B}. Similarly R_(2) is defined from B to C such that R_(2) = {(x, y) : 2x le y, x in B and y in C} then R_(1)oR_(2)^(-1) is

Answer»

{(3, 1)}
{(1, 1)}
{(1, 3)}
`PHI`

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