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按规律填数.(1)21,18,15,( ),( ),6,( ),0.(2)3,9,27,81,( ),( ),( ).
按规律填数.
(1)21,18,15,( ),( ),6,( ),0.
(2)3,9,27,81,( ),( ),( ).
(3)3,1,3,4,3,9,3,16,3,( ),( ).
人气:118 ℃ 时间:2019-08-18 09:23:11
解答
按规律填数.(1)21,18,15,( 12 ),( 9 ),6,( 3 ),0.
(2)3,9,27,81,( 243 ),( 729 ),( 2187 ).
(3)3,1,3,4,3,9,3,16,3,(25 ),( 3 ).
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