(2009/1-1)(2008/1-1)(2007/1-1)...(2000/1-1)

分类: 作业答案 • 2023-01-19 10:30:11

问题描述：

(2009/1-1)*(2008/1-1)*(2007/1-1)...(2000/1-1)

答

(2009/1-1)*(2008/1-1)*(2007/1-1)...(2000/1-1)
=2000/1999*2001/2000*……*2007/2006*2008/2007*2009/2008
=2009/1999

(2009/1-1)*(2008/1-1)*(2007/1-1)...(2000/1-1)