Question

funçao inversa de y=3x-3

Answer 1

y = 3x - 3

Isolamos o "x":

$\displaystyle \mathsf{y = 3x - 3}\\ \displaystyle \mathsf{3x = y + 3}\\ \\ \displaystyle \mathsf{y = \frac{y + 3}{3}}$

Agora, substituímos "y" por "x" e vice-versa:

$\displaystyle \mathsf{x = \frac{y + 3}{3}}\\ \\ \displaystyle \mathsf{y = \frac{x + 3}{3}}\\ \\ \\ \displaystyle \boxed{\mathsf{Resposta: y = \frac{x + 3}{3}}}$