Question

URGENTE
Considere as alternativas abaixo:

1. y=x+13
2. y=x−1−−−−−√3
3. y=−3x
4. y=3x+1
Qual das alternativas determina a função inversa de y = 3x - 1?

Answer 1

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