If f(x) = (1-x)
------
x
what is f(f(x))
please could you explain it too? I have no idea whatsoever what I'm doing.
here is how function notations work. whatever shows up in the brackets, you replace x with it (or whatever variable the function is defined for)
example: if
then, ..........i replaced x with 1
..................i replaced x with 3
...............i replaced x with ....(assume is in the domain of g(x) )
what if we had another function?
then, ...........i replaced the x in g(x) with h(x)
and
............i replaced the x in h(x) with g(x)
now, can you do your problem?