找规律填空: (1)1,3,9,27,_,243   (2)2,7,12,22,_,_,37 (3)5,8,11,15_  (4)1,1,2,3,5,8,_21.

问题描述:

找规律填空:
(1)1,3,9,27,______,243      
(2)2,7,12,22,______,______,37
(3)5,8,11,15______        
(4)1,1,2,3,5,8,______21.

(1)1,3,9,27,81,243;      
(2)2,7,12,22,27,32,37;
(3)5,8,11,15,19;        
(4)1,1,2,3,5,8,13,21.
故答案为:81;27,32;19;13.