Question

Sejam as funções reais f(x)=3x-5 e g(x)=9x²-3x+1. determine a lei da função fog.

Answer 1

$f(x)=3x-5\\\\f(g(x))=3g(x)-5\\\\f(g(x))=3(9x^{2}-3x+1)-5\\\\f(g(x))=27x^{2}-9x+3-5\\\\\\\boxed{\boxed{f(g(x))=27x^{2}-9x-2}}$