Respostas

2014-05-21T14:43:48-03:00
F(x)=3x-2

f(-1)=3.(-1)-2
f(-1)=-3-2
f(-1)=-5

f(2)=3.2-2
f(2)=6-2
f(2)=4

f(3)=3.3-2
f(3)=9-2
f(3)=7

f(-1)+f(2)-f(3)
-5+4-7
-8