Question

Show that f(x)= –2x+19 has the inverse of f^(–1) (x)=(x –19)/(–2) by finding f^(–1) (f(x)).

Answer 1

It is asking you to verify they are inverses.
It wants you to plug in the first function into the second function.

Answer 2

\[f^{-1}(f(x))=f^{-1}(-2x+19)\]
whereever you see x in f inverse of x replace that x with (-2x+19)