Question

求学霸帮我解道初三数学题谢谢啦

求学霸帮我解道初三数学题谢谢啦最好给个过程谢谢学霸

Answer 1

＝1-1╱2+1╱2-1╱3+1╱3-1╱4+1╱4-1╱5+…+1╱9-1╱10
＝1-1╱10
＝9╱10

追答

请采纳

Answer 2

=(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)
=1-1/10
=9/10

Answer 3

供参考。

追答

You're welcome.

Answer 4

。

追答

Answer 5

！