The question is asking you to create 2 functions, f and g, so that when you put g INTO f in place of the x, you get 1/(x+7)5
This is a possible solution: f (x) = 1/x5 and g(x) = (x + 7).
Another possible solution is: f (x) = 1/x and g(x) = (x + 7)5
In both cases, if you put the g function into the f function in place of the x, you will get the desired composite.