diketahui f(x) = x-1 domain {x/x <5 ,x € bilangan asli},tentukan range nya

domain = { 1,2,3,4}

f(1) = 1 - 1 = 0
f(2) = 2-1 = 1
f(3) = 3-1 = 2
f(4) = 4-1 = 3

range = {0,1,2,3}