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问题:
问题描述:
1-12-16-112-120-.-12003乘2004
着到数学题,怎样解
卢冰回答:
=1-1/2-(1/2-1/3)-(1/3-1/4)-(1/4-1/5)-.-(1/2003-1/2004)
=1-1/2-1/2+1/3-1/3+1/4-1/4+1/5-.-1/2003+1/2004
=1/2004