1/(2*3)=1/2-1/3你先验证一下,对吧
1/(6*7)+1/(7*8)+1/(8*9)+.+1/(100*101)
=1/6-1/7+1/7-1/8+1/8-1/9+.+1/100-1/101
=1/6-1/101
=95/606