1=1/2+1/3+1/6 (3个)
1=1/3+1/4+1/4+1/6 (4个)
1=1/3+1/4+1/6+1/8+1/8 (5个)
1=1/3+1/4+1/6+1/8+1/16+1/24+1/48 (7个)
1=1/3+1/4+1/8+1/12+1/18+1/24+1/36+1/48 (9个)
不信你试一下.
1=1/2+1/3+1/6 (3个)
1=1/3+1/4+1/4+1/6 (4个)
1=1/3+1/4+1/6+1/8+1/8 (5个)
1=1/3+1/4+1/6+1/8+1/16+1/24+1/48 (7个)
1=1/3+1/4+1/8+1/12+1/18+1/24+1/36+1/48 (9个)
不信你试一下.