Respuesta :

Answer:

1st option

Step-by-step explanation:

To obtain (f ○ g)(x) , substitute x = g(x) into f(x)

(f ○ g)(x)

= f(g(x)

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

= [tex]\frac{2}{\frac{1}{2x}+3 }[/tex]

= [tex]\frac{2}{\frac{1}{2x}+3 }[/tex] × [tex]\frac{2x}{2x}[/tex]

= [tex]\frac{4x}{1+6x}[/tex]