1+1/3+1/6+1/16+1/24+1/48+1/96
1/3+1/6+1/12+1/24+1/48+1/96
1/3+1/6+1/12+1/24+1/48+1/96
1/3+1/6+1/12+1/24+1/48+1/96
1/3+1/6+1/12+1/24+1/48+1/96
1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384
Tính nhanh C = 1/3 + 1/6+ 1/12 + 1/24 + 1/48 + 1/96
tinh nhanh
1/3+1/6+1/12+1/24+1/48+1/96
Tính nhanh
1/3+1/6+1/12+1/24+1/48+1/96+1/192