Question

1,1/2,3/13,1/10,5/121 数字推理

Answer 1

规律如下：

1 = 1/1

1/2 = 2/4 = 2/(1+3)

3/13 = 3/13 = 3/(1+3+9)

1/10 = 4/40 = 4/(1+3+9+27)

5/121 = 5/121 = 5/(1+3+9+27+81)