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2024-03-20 09:56:35
1/2+2/3+3/4+5/6+....+99/100
=1/1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6...+1/99-1/100
=1/1+(-1/2+1/2)+(-1/3+1/3)+(-1/4+1/4)+(-1/5+1/5)+...+(-1/99+1/99)+1/100
=1/1+0+0+0+0+...+0-1/100
=1/1-1/100
=100/100-1/100
=99/100
2024-03-20 09:50:38
@Nguyễn Việt Dũng rồi ngắn dữ chưa ??
2024-03-18 09:20:43
Lớp 6B có số hs là
10:1/4=40(hs) Đ/S: 40 hs