suatu fungsi f:x=2x+1 memiliki daerah asal {1,2,3} daerah hasil fungsi itu adalah

f(x) = 2x+1
f(1) = 2(1)+1 = 2+1 = 3
f(2) = 2(2)+1 = 4+1 = 5
f(3) = 2(3)+1 = 6+1 = 7

Semoga membantu yaa:)

f(x) = 2x + 1

domain = {1,2,3}

f(1) = 2.1 + 1 = 3
f(2) = 2.2 + 1 = 5
f(3) = 2.3 + 1 = 7

kodomain/daerah hasil/range = {3,5,7}