Respostas

2013-07-28T14:42:50-03:00
F(0) = 2.0 + 1 = 1

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

f(3) = 2.3 + 1 = 7
1 5 1
2013-07-28T14:49:07-03:00
É só substituir o x:
 f(0)= 2.0+1
   f(0)= 0+1
    f(0)= 1

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

 f(3)=2.3+1
 f(3)=6+1
 f(3)=7

2 5 2