Jawabanmu

2014-08-24T23:23:24+07:00
Daerah asal = {-1,0,1,2}
utk x = -1
2.(-1) -1 = -2 -1 = -3

utk x = 0
2.0-1 = -1

utk x=1
2.1-1 = 1

utk x =2
2.2 -1 = 3

Jadi daerah hasil ={-3, -1,1, 3}