Question

The domain and range of relation $R = \{ (x , y ) /x , y \in N , x + 2y = 5\}$ is

• A. $\left\{1 , 3\right\}, \left\{2 , 1\right\}$
• B. $\left\{2, 1\right\}, \left\{3, 2\right\}$
• C. $\left\{1, 3\right\}, \left\{1, 1\right\}$
• D. $\left\{1,2\right\}, \left\{1, 3\right\}$

Answer 1

Answer: (A)

$x + y = 5 \, \Rightarrow \, x \in N.y \in N$
Domain .= Set of values of $x = \{1,3\}$
Range = Set of values of $y=\{1,2\}$