Question

Let A = {(x, y): x + 3y = 12, x ϵ N and y ϵ N}. 

(i) Write R in roster form. 

(ii) Find dom (R) and range (R).

Answer 1

Given: A = {(x, y): x + 3y = 12, x ϵ N and y ϵ N} 

(i) So, R in Roster Form is, 

R = {(3, 3), (6, 2), (9, 1)} 

(ii) Dom(R) = {3, 6, 9} 

Range(R) = {1, 2, 3}