If A = {5, 7, 9, 11}, B = {9, 10} and a R b is defined as a < b such that a ∈ A, (a, b) ∈ R, b ∈ B, then find the domain, co-domain and range of R.
a R b means a < b
Then R = {(5, 9), (5, 10), (7, 9), (7, 10), (9, 10)}
Domain = {5, 7, 9} → set of first components of all the ordered pairs which belong to R
Co-domain = {9, 10} → set B is called co-domain of relation R
Range = {9, 10} → set of second components of all the ordered pairs which belong to R.