Question

Função Inversa: f(- 3)-¹ f(x) = 6x - 12

Answer 1

$f(x) = 6x - 12\\ y = 6x - 12\\ x=6y-12\\ 6y=x+12\\ \\ y=\frac{x+12}{6}\\ \\ \boxed{f^{-1}x=\frac{x+12}{6}}\\ \\ \boxed{\boxed{f^{-1}(-3)=\frac{-3+12}{6}=\frac{9}{6}=\frac{3}{2}}}$