Question

Let $\rho$ be a relation defined on a set of natural numbers N, as $\rho$={(x,y)∈N×N:2x+y=4}, then domain A and range B are

• A. A⊂{x∈N:1≤x≤20} and B⊂{y∈N:1≤y≤39}
• B. A={x∈N:1≤x≤15} and B={y∈N:2≤y≤30}
• C. A≡N,B≡Q
• D. A=Q,B=Q

Answer 1

Answer: (A)

A⊂{x∈N:1≤x≤20} and B⊂{y∈N:1≤y≤39}

Answer 2

The correct answer is option (A): A⊂{x∈N:1≤x≤20} and B⊂{y∈N:1≤y≤39}