question_answer

Let R is a relation on N defined by \[\mathbf{x}+\mathbf{2y}=\mathbf{8}\]. Then, the domain of R is

A)  \[\left\{ 2,4,6,8 \right\}\]            

B)  \[\left\{ 2,4,6 \right\}\]      

C)  \[\left\{ 2,4,8 \right\}\]                           

D)  \[\left\{ 1,2,3,4 \right\}\]