Respostas

2014-05-15T19:36:29-03:00
F(x)=2x+1
f(x)=2 .(-2) +1
f(x)= -4 +1= -3

f(x)=2x+1
f(x)=2.(-1) +1
f(x)= -2+1= -1

f(x)=2x+1
f(x)= 2. 0 +1
f(x)= 0 +1= 1

f(x)=2x+1
f(x)=2 .2 +1
f(x)= 4+1=5

Im={ -3 ;-1 ; 1 ; 5 }