Split this up as follows:Originally Posted by SunGod
and so on until
Then add all these sums, using the formula for geometric sums. There is also a way to do this with calculus.
Hey thanks for the solution, I've already handed in the work alas without the proof of that question, but at least now I know the logic behind working out a complicated summation like that (complicated on my level, anyway)
I've also read the other solution which requires calculus, thanks alot