Respostas

2014-07-13T11:13:40-03:00
F(x) = -2x + 3

f(1) = -2.1 + 3
f(1) = -2 + 3
f(1) = 1

f(x) = 4x + 5  → f(x) = 7

4x + 5 = 7
4x = 7 - 5
4x = 2
x = 2/4 = 1/2
2 5 2