1/2×1/3＋1/3×1/4＋1/4×1/5＋1/5×1/6＋…………1/99×1/100
1/2×1/3＋1/3×1/4＋1/4×1/5＋1/5×1/6＋…………1/99×1/100
日期：2021-09-08 13:20:02 人气：1
1/2×1/3＋1/3×1/4＋1/4×1/5＋1/5×1/6＋……+1/99×1/100
=(1/2-1/3)＋(1/3-1/4)＋(1/4-1/5)＋(1/5-1/6)＋……+(1/99-1/100)
=1/2-1/100
=49/100
=(1/2-1/3)＋(1/3-1/4)＋(1/4-1/5)＋(1/5-1/6)＋……+(1/99-1/100)
=1/2-1/100
=49/100