按规律填空 (1)1,3,2,6,3,9,( ),( ),( ).(2)9,13,17,21( ),29,( ).
问题描述:
按规律填空 (1)1,3,2,6,3,9,( ),( ),( ).(2)9,13,17,21( ),29,( ).
(3)4,9,16,25,( ),49( ),( ).
(4)6,7,9,12,16,21,( ),( ),
答
(1)1,3,2,6,3,9,( 4),(12 ),(5 ).
(2)9,13,17,21( 25),29,( 33).
(3)4,9,16,25,( 36),49( 64),(81 ).
(4)6,7,9,12,16,21,(27 ),(34 ),