Question
A Relation $R$ is given by the set $\left\{\frac{x, y}{y}=x+3, x \in\{0,1,2,3,4,5\}\right\}$. Determine its domain and range.

Answer

x = {0, 1, 2, 3, 4, 5} y = x + 3 when x = 0 ⇒ y = 0 + 3 = 3 when x = 1 ⇒ y = 1 + 3 = 4 when x = 2 ⇒ y = 2 + 3 = 5 when x = 3 ⇒ y = 3 + 3 = 6 when x = 4 ⇒ y = 4 + 3 = 7 when x = 5 ⇒ y = 5 + 3 = 8 R = {(0, 3) (1, 4) (2, 5) (3, 6) (4, 7) (5, 8)} Domain = {0, 1, 2, 3, 4, 5} Range = {3, 4, 5, 6, 7, 8}

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