Question

sejam as funções reais f(×)×-2 e g(×)=×^2-6×+1
determine 4f(g(2))-3g(f(4))

Answer 1

Olá Erison

f(x) = x - 2
g(x) = x² + 6x + 1

g(2) = 2² + 6*2 + 1 = 4 + 12 + 1 = 17 
f(17) = 17 - 2 = 15
4f(g(2)) = 4*15 = 60

f(4) = 4 - 2 = 2
g(2) = 2² + 6*2 + 1 = 4 + 12 + 1 = 17 
3g(f(4)) = 3*17 = 51

diferencia pedida
60 - 51 = 9