Respostas

2014-05-21T10:45:04-03:00
F(x) = 2x + 3

a)f(x)=1
    2x + 3 = 1
    2x = 1 - 3
    2x = -2
    x = -2/2
    x = -1

b)f(x)=0
    2x + 3 = 0
    2x = -3
    x = -3/2
    x = -1,5

c)f(x)=1/3
    2x + 3 = 1/3
    2x = 1/3 - 3
    2x =  \frac{1-9}{3}
    2x = -8/3
    x = -8/6
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