找规律2,3,4,9,8,27,16( ) ( )
问题描述:
找规律2,3,4,9,8,27,16( ) ( )
答
2,3,4,9,8,27,16,(81),(32)
奇数项是公比为2的等比数列;
偶数项是公比为3的等比数列.