Question

Let R be a relation on N defined by x + 2y = 8. The domain of R is

A. {2, 4, 8}
B. {2, 4, 6, 8}
C. {2, 4, 6}
D. {1, 2, 3, 4}

Answer 1

C. {2, 4, 6}

{2, 4, 6}

∵ R={(2,3),(4,2),(6,1)}

Hence domain(R)={2,4,6}