Fungsi f:x +1 dengan daerah asal (2,4,6,8)memiliki daerah hasil

f(x) = x + 1
domain = {2,4,6,8}
maka
f(2) = 2 + 1 = 3
f(4) = 4 + 1 = 5
f(6) = 6 + 1 = 7 
f(8) = 8 + 1 = 9

jadi daerah hasil = {3,5,7,9}