Question

Let R = {(1,4), (2,4),(3,6),(4,8)} be a relation on the set {1,2,3……9}. Find the domain and
range of R

Answer 1

Answer:

A={1,2,3,4,6}

R={(a,b):a,b∈A,b is exactly divisible by a}

(i) R={(1,1),(1,2),(1,3),(1,4),(1,6),(2,2),(2,4),(2,6),(3,3),(3,6),(4,4),(6,6)}

(ii) Domain of R={1,2,3,4,6}

(iii) Range of R={1,2,3,4,6}

Answer 2

Answer:

A = {1,2,3,4,6}

R = {(a, b) : a, b €

A, b is exactly divisible by a}

(i) R =

{(1, 1), (1, 2), (1, 3), (1, 4), (1, 6), (2, 2), (2, 4 (ii) Domain of R = {1,2,3,4,6}

(iii) Range of R = {1,2,3,4,6}