(1-1/2006)*(1-1/2005)*(1-1/2004).(1-1/1001)*(1-1/1000)
(1/2008-1)*(1/2007-1)*(2006-1).(1/1001-1)*(1/1000-1)
计算:(2+1/2003+1/2004+1/2005)*(1/2003+1/2004+1/2005+1/2006)—(2
计算:(2+1/2003+1/2004+1/2005)*(1/2003+1/2004+1/2005+1/2006)-(2
1.(1/2004-1)(1/2003-1)(1/2002-1)...(1/1001-1)(1/1000-1) 2.(-
计算:(1/2006-1)*(1/2005-1)*(1/2004-1)*.*(1/3-1)*(1/2-1))
(1/2008-1)(1/2007-1)(1/2006-1)……(1/1001-1)(1/1000-1)
(2009/1-1)×(2008/1-1)×(2007/1-1)×.×(1001/1-1)×(1000/1-1)
(1998/1-1)(1997/1-1)(1996/1-1)...(1001/1-1)(1000/1-1)
(1/2015-1)*(1/2014-1)*(1/2013-1)*...*(1/1001-1)*(1/1000-1)
(2003/1-1)×(2002/1-1)×(2001/1-1)×.×(1001/1-1)×(1000/1-1)=?
(1998/1-1)*(1997/1-1)*(1996/1-1)*.*(1001/1-1)*(1000/1-1).
(1998/1-1)(1997/1-1)(1996/1-1).(1001/1-1)(1000/1-1).