(1-1/2)加(1/2-1/3)加(1/3-1/4)加.(1/2005减1/2006)等于多少?

问题描述:

(1-1/2)加(1/2-1/3)加(1/3-1/4)加.(1/2005减1/2006)等于多少?

1-1/2006=2005/2006.1-1/n