2,1,1/3,1/12(),
2,1,1/3,1/12(),
1/2+1/3-1/4除以1/12等于
1/1*2*3+1/2*3*4+1/3*4*5+.1/11*12*13
根据1/2=1/3+1/6,1/3=1/4+1/12填空
2/1 3/1 4/1 5/1 6/1 8/1 10/1 12/1 15/1 20/1
(1/2+1/4+1/6+1/8)-(1/3+1/6+1/9+1/12)+(1/4+1/8+1/12+1/16)-(1/
(1/2+1/4+1/6+1/8)-(1/3+1/6+1/9+1/12)+(1/4+1/8+1/12+1/16)-(1/
找规律填空:1/12,1/6,1/4,1/3,5/12,1/2,().
1 1/2+2 1/6+3 1/12+4 1/20+.20 3Q
(1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9+1/10+1/11+1/12+1/13+1/14+1/
计算 2/3+1/6+1/12+1/24+1/48+1/96+1/192
递等式计算 1/2-1/3+1/4-1/5+1/6-1/12