Can somebody help with this?
Evaluate as a telescoping series: The summation from k=1 to infinity of (k-1)/2^(k+1).
The answer is 1/2 but I need to see the workings so I can figure out how it was arrived at.
Lol yeah I know. I've been reading about the whole telescoping sum thing recently and it can easily be wrongly applied to infinite sums to show things like 0=1.
Was just being annoyingly rigorous and hoping OP would catch on and realize either you must show it or do it your way with only summing to N terms.