Question

找规律,写出后面三个数,和第n个数.急

Answer 1

1,21,31,41,51,61,71,.,(10n+1)

1/3,5/6,9/9,13/12,17/15,.,(4/3-n)

1/2,2/5,3/10,4/17,.,(n/n^2+1)

0,3,8,15,24,.,(n^2-1)