On the set $Z$ of all integers let $R$ be the relation $\left\{(x, y)=x^2+y^2 \leq 9\right\}$. Then

Question

On the set $Z$ of all integers let $R$ be the relation $\left\{(x, y)=x^2+y^2 \leq 9\right\}$. Then Dom R =

Professor PC Thomas Classes · Answer

If $(x . y) \in R$ then $(y . x) \in R$ and viceversa $ 	ext { ∴ Dom } R=	ext { Ran } R $