Respuesta :

Answer:

f(4) =[tex]\frac{1}{2}[/tex]

x = 8

Step-by-step explanation:

f(4) =[tex]\frac{1}{2}[/tex]     [ image of 4 is  [tex]\frac{1}{2}[/tex]]

f(x) = 4

then x = 8  [ the preimage of 4 is 8]