Let A = {2, 3, 4, 5} and B = {3, 6, 7, 10}. Let R = {(x, y): x ϵ A, y ϵ B and x is relatively prime to y}.
(i) Write R in roster form.
(ii) Find dom (R) and range (R)
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Given: A = {2, 3, 4, 5} and B = {3, 6, 7, 10}
(i) R = {(x, y), : x ϵ A, y ϵ B and x is relatively prime to y}
So, R in Roster Form,
R = {(2, 3), (2, 7), (3, 7), (3, 10), (4, 3), (4, 7), (5, 3), (5, 6), (5, 7)}
(ii) Dom(R) = {2, 3, 4, 5}
Range(R) = {3, 6, 7, 10}