1/2 4/4 9/6 16/8 ( 25/10) (36/12)
分子1,4,9,16,25,36.....分别是1,2,3,4,5,6...的平方
分米2,4,6,8,10,12....是公差为2的等差数列
分子依次x2,分母是1~6的平方,所以然后是10/25,12/36
1/2 4/4 9/6 16/8 ( 25/10) (36/12)
分子1,4,9,16,25,36.....为1,2,3,4,5,6...的平方
分母2,4,6,8,10,12....是依次加2
25/10 36/12
27/10...40/12