(1/2-1/4)+(1/4-1/6)+(1/6-1/8)……+(1/48-1/50)简便算
问题描述:
(1/2-1/4)+(1/4-1/6)+(1/6-1/8)……+(1/48-1/50)简便算
答
-1/4与1/4相消,-1/6与1/6相消.最后剩1/2-1/50=24/50
(1/2-1/4)+(1/4-1/6)+(1/6-1/8)……+(1/48-1/50)简便算
-1/4与1/4相消,-1/6与1/6相消.最后剩1/2-1/50=24/50