Respostas

2014-06-02T18:07:37-03:00
F(g(x))
- g(x) = x - 9
f(x - 9) = x - 9 +7 = x - 2


g(f(-2))
f(-2) = -2 + 7 = 5
g(5) = 5 - 9 = -4



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