I'm trying to get a closed form of a summation, however n is in the summation itself. Here's an example: Ive never encountered such a thing. What happens to the n? Does it stay in there as n in the closed form? So then we have n/2^k which the closed form turns out to be: n/ [2^(n+1)-1 / (2-1)] However, when I tested my solution using a test value, the two versions didnt check out, so obviously I'm doing something wrong. And the instructions say to read the question carefully, which is kinda scary as wel.