Respostas

2013-10-28T20:01:49-02:00
Basta substituir

f(x)=3x-8

f(1/2)= 3. 1/2 - 8
f(1/2)= 3/2 - 8
f(1/2)= 1.5 - 8
f(1/2)= 6.5
2013-10-28T20:45:51-02:00
F(1/2)= 3. 1/2 - 8
f(1/2)= 3/2 - 8
f(1/2)= 1.5 - 8
f(1/2)= 6.5