Question

Determine a inversa das funções:
a) f(x) = 3x + 1
b) f(x) = 5x – 2

ajudem, pleaseeeeee​

Answer 1

y=3x+1

3x=y-1

x= y-1/3

f-¹(x) = x-1/3

y=5x -2

5x = y+2

x = y+2/5

f-¹(x) = x+2/5

Answer 2

a) f(x) = 3x + 1   ==> f(x) = y

    y = 3x + 1

     x = 3y + 1  ==> isole o Y

     $\frac{x-1}{3} = y$

b) f(x) = 5x - 2

     y = 5x - 2

     x = 5y - 2  ==> isole o Y

      $\frac{x+2}{5} = y$