Let A = {1, 2, 3} and R = {(a, b) : | a2− b2 | ≤5, a, b 
A}. Then write R as set of ordered pairs.
Here,A={1,2,3}
R={(a,b) : |a2-b2|≤5,a,b ϵ A}
={(1,1),(1,2),(2,1),(2,2),(2,3),(3,2),(3,3)}
1
Let A = {1, 2, 3} and R = {(a, b) : | a2− b2 | ≤5, a, b A}. Then write R as set of ordered pairs.
Here,A={1,2,3}
R={(a,b) : |a2-b2|≤5,a,b ϵ A}
={(1,1),(1,2),(2,1),(2,2),(2,3),(3,2),(3,3)}