I have function $f$, where $f^n$ denotes composition and $0<k<1$. I need to write the following in summation notation:
$$f^0(k^n)+f(k^{n+1})+f^2(k^{n+2})+f^3(k^{n+3})+\dots +f^{n+p-1}(k^{n+p-1}) $$
I should be able to write something like this?
$$\sum_{i=0}^{n+p-1}f^i(k^{?})$$