(1/2006-1)(1/2005-1)(1/2004-1)...(1/1001-1)*(1/1000-1)尽快!
问题描述:
(1/2006-1)(1/2005-1)(1/2004-1)...(1/1001-1)*(1/1000-1)
尽快!
答
=-2005/2006*(-2004/2005)*……*(-1000/1001)*(-999/1000)
=-999/2006