# A = {1, 2, 3, 5}

Given: A = {1, 2, 3, 5} and B = {4, 6, 9}

R = {(x, y): the difference between x and y is odd; x A, y B}

Now the difference should be odd. Let us take all possible differences.

(1 - 4) = - 3, (1 - 6) = - 5, (1 - 9) = - 8
(2 - 4) = - 2, (2 - 6) = - 4, (2 - 9) = - 7
(3 - 4) = - 1, (3 - 6) = - 3, (3 - 9) = - 6
(5 - 4) = 1, (5 - 6) = - 1, (5 - 9) = - 4

Taking the difference which are odd we get,

Hence the relation in roaster form, R = {(1,4), (1,6), (2,9), (3,4), (3,6), (5,4), (5,6)}

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