Question

estou com dúvida na função inversa de
$f(x) = \frac{x + 5}{3}$

Answer 1

-Chama f(x)de y
-Troca x e y de lugar
-Isole y

$f(x)=\dfrac{x+5}{3}\\\\\\y=\dfrac{x+5}{3}\\\\\\x=\dfrac{y+5}{3}\\\\\\3x=y+5\\\\\\y=3x-5\\\\\\f^{-1}(x)=3x-5$