Answer
Verified
Work Step by Step
We have $g^{-1} (f^{-1}([f (g(x) ) ]))=g^{-1} (g(x))=x$
and
$f(g (g^{-1} (f^{-1}(x))]))=f^{-1} (f(x))=x$
Thus, the result has been verified.
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