A little interesting bit of Maths (Warning: it blow up your mind) 1+2+3+….=? 這個sum series的答案是甚麼﹖Infiinity﹖不是，答案其實是分數而且是負數 🙂 http://www.youtube.com/watch?v=w-I6XTVZXww Share this:TwitterFacebookLike Loading...
論盡物理宇宙 - 某80後物理學博士的科普blog 
more explanation, http://www.nottingham.ac.uk/~ppzap4/response.html