221 sats \ 1 reply \ @MalwareLab 25 Sep \ on: [Daily puzzle] \sum_0^{120} \frac{1}{\sqrt{n+1}+\sqrt{n}} = ? charts_and_numbers
Nice puzzle, with simple rewriting the fraction we can get all denominators equals to 1 and then we will get the telescope... So, the sum is equals to \sqrt{121} - \sqrt{0} = 11 :-)
Yep, this is what I did, too! Too hard to write in text form here...
reply