Respostas

2014-02-13T21:30:03-02:00
F(0)=-1
f(5)=16
se for para 3x-1
3(-1)-1/-1-7=-4/-8= +1/2
3(0)-1/0-7=-1/-7= +1/7
3(5)-1/5-7=14/-2= -7

Substituindo ficaria
5*(1/2)-2(1/7)+3(-7)= 5/2-2/7-21 /7
35-4-14*21 /14 /7=
31-294/ 14 /7= -263/14 / 7 / 1 = -263/14 * 1/7 = -263/98