Given a and b are integers, i.e. a,b ∈ Z.

∴ Domain of R = Set of all first elements in the relation.

= Values of ‘a’ which are in the relation.

=Z (Integers)

Range of R=Set of all second elements in the relation.

=Values of ‘b’ which are in the relation.

=Z(Integers)

Since, a²+ b² = 25 and a, b are integers;

⇒ R= {(5,0), (0,5), (-5,0), (0, -5), (3,4), (4,3), (-3, -4), (-4, -3),

(-3,4), (4, -3), (-4,3), (3, -4)}

⇒ Domain of R= {-5, -4, -3,0,3,4,5}