Respostas

2013-07-15T13:57:12-03:00
Substitui o valor de x por 3:
f(3)=3³+3.3+15
f(3)=27+9+15
f(3)=51
2013-07-15T13:57:35-03:00
f(X)=x³+3x+15
 f(3)= 3³ + 3*3 + 15
 f(3) = 27+ 9 + 15
 f(3) = 51
1 5 1