优质解答
2002+2001-2000-1999+1998+1997-1996-1995+……+2+1=
1/1*2*3+1/2*3*4+.+1/98*99*100
1+1/2)(1+1/3)(1+1/4).(1+1/100)
------------------------------------
(1-1/2)(1-1/3)(1-1/4).(1-1/100)
2002+2001-2000-1999+1998+1997-1996-1995+……+2+1=
1/1*2*3+1/2*3*4+.+1/98*99*100
1+1/2)(1+1/3)(1+1/4).(1+1/100)
------------------------------------
(1-1/2)(1-1/3)(1-1/4).(1-1/100)