作业帮怎么简便怎么算 1/1×1/2＋1/2×1/3＋1/3×1/4＋1/4×1/5+……1/49×1/50
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 03:38:05
怎么简便怎么算 1/1×1/2＋1/2×1/3＋1/3×1/4＋1/4×1/5+……1/49×1/50
怎么简便怎么算 1/1×1/2＋1/2×1/3＋1/3×1/4＋1/4×1/5+……1/49×1/50
怎么简便怎么算 1/1×1/2＋1/2×1/3＋1/3×1/4＋1/4×1/5+……1/49×1/50
1/1×1/2＋1/2×1/3＋1/3×1/4＋1/4×1/5+……1/49×1/50
=(1-1/2)+(1/2-1/3)+.+(1/49-1/50)
=1-1/50
=49/50