Question
Let R be a relation defined on $\mathbb{N}$ as $a\mathrm{R}b$ if $2a+3b$ is a multiple of $5,a,b\in \mathbb{N}$. Then R is
Let R be a relation defined on $\mathbb{N}$ as $a\mathrm{R}b$ if $2a+3b$ is a multiple of $5,a,b\in \mathbb{N}$. Then R is