Let X={1,2,3} and Y ={4,5}. Find whether the following subsets of X×Y are functions from X to Y or not.
(i)g={(1,4),(2,4),(3,4)}
Given that, X ={1,2,3}and Y ={4,5}
X×Y=(1,4),(1,5),(2,4),(2,5),(3,4),(3,5)
(ii)g={(1,4),(2,4),(3,4)}
Since, g is a function as each element of the domain has unique image.