（1-1/2 ＋1/3-1/4 ＋1/5…… ＋1/50）/[1/(1 ＋25) ＋1/(2 ＋25)……＋1/(25＋ 25)]对不起我提的问题是：（1-1/2 ＋1/3-1/4 ＋1/5…… ＋1/50）/[1/(1 ＋25) ＋1/(2 ＋25)……＋1/(25＋ 25)] 谢谢你的关注！
热心网友
1-1/2+1/3...+1/49-1/50=1-1/2-1/4-1/8-1/16-1/32+1/3-1/6-1/12-1/24-1/48+1/5-1/10-1/20-1/40+1/7-1/14-1/28+1/9-1/18-1/36+1/11-1/22-1/44+1/13-1/26+1/15-1/30+1/17-1/34+1/19-1/38+1/21-1/42+1/23-1/46+1/25-1/50+1/27+1/29+1/31+...+1/49=1/26+1/27+1/28+...+1/50所以原式=1