Q5 of 65 Page 67

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).


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}


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