找规律填空找规律填.8,15,2,2,( ),( ),( ),( )57,63

问题描述:

找规律填空找规律填.8,15,2,2,( ),( ),( ),( )57,63
找规律填8,15,2,2,( ),( ),( ),( ),57,63.

找规律填空找规律:
8,
15,
22,
(29),
(36),
(43),
(50),
57,
63
前后相差7,也就是等差数列.【an=8+(n-1)*7=7n+1】那最后一个数也应该是64呀?题可能错了吧,要不然怎么会没有规律呢?