Respuesta :

caylus
Hello,

As f(x) is a bijection , f^(-1)(x) is also a function.
if gof(x)=x then g^(-1)*gof(x)=g^(1)(x)==>f(x)=g^(-1)(x) f is the inverse of g

g(f(x))=g(2x+4)=((2x+4)-4)/2=2x/2=x.

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