Question

sendo f(x) = 4x + 1 e g(x)= 3x-1 determine g(f(x))

Answer 1

Se $g(x)=3x-1\,,$ então

$g(f(x))=3\,f(x)-1\\\\ g(f(x))=3\,(4x+1)-1\\\\ g(f(x))=12x+3-1\\\\ \boxed{\begin{array}{c}g(f(x))=12x+2 \end{array}}$