Respostas

2014-05-08T17:08:31-03:00
F(-1)=a(-1)+b=3-> -a+b=3 -> b=3+a
F(1)= a(1)+b=1-> a+b=1 -> a+(3+a)=1 2a+3=1-> 2a=1-3-> a=-2/2 -> a=-1
Substituindo b=3+(-1)-> b=3-1 b=2