Respuesta :

Remember the following property of invertible functions:

[tex]f(x)=y\qquad\Leftrightarrow\quad f^{-1}(y)=x[/tex]

Then:

[tex]f^{-1}(f(x))=x\qquad\forall x[/tex]

Then:

[tex]f^{-1}(f(7))=7[/tex]

Therefore, the answer is: 7.

Otras preguntas