(1/2006-1)(1/2005-1)(1/2004-1)...(1/1000-1)写出过程,讲解!急!~~

问题描述:

(1/2006-1)(1/2005-1)(1/2004-1)...(1/1000-1)
写出过程,讲解!急!~~

=(-2005/2006)(-2004/2005)……(-999/1000)
=-999/2006