Question

Considerando f(x)=x+7 e g(x)=x-9,determine: (fog)(x) e gof(-2)

Answer 1

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