Question

Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x.
f(x) =4/x. and g(x) =4 /x

Answer 1

okay let's put y=g(x)
then f(g(x))=f(y)=4/y
now you replace y by g(x)
f(g(x))=4/g(x)
now you replace g(x) by its expression
f(g(x))=4/(4/x)=4*(x/4)=x

Answer 2

Thank you!!

Answer 3

the same thing for g(f(x))
you're welcome :)