1-(1+2/1-1+2+3/1-1+2+3+4/1-……-1+2+3+…100/1)=?
问题描述:
1-(1+2/1-1+2+3/1-1+2+3+4/1-……-1+2+3+…100/1)=?
答
(1994*1992+1)/1992*1992/1993
==(1994*1992+1)/1993
==((1993+1)*(1993-1)+1)/1993
==(1993^2)/1993
==1993