1. The problem statement, all variables and given/known data Let Ʃ 1\(n^2-1) from n=2 to k. It says find a closed for it and prove it using sum notation. 2. Relevant equations 3. The attempt at a solution I can easily prove it by induction but I don't know what a closed form means. I tried looking it up online but there really isn't much info and nothing is stated in my textbook about. All I know is the sequence when expanded looks like 1/3+1/8+1/15+1/24+...+1/n^2-1. Then not sure how to put it in closed form?