Given that f(x) is a function such that f(1)=2, f(4)=3, f(7)=4, and f^{-1}(x) is the inverse of f(x), what is f^{-1}(f^{-1}(3))?
f^{-1}(f^{-1}(3))
f-1 (3) = 4
So
f-1 ( f-1(3) ) =
f-1 ( 4) = 7
+586 
