数学按规律填空(1)3,4,6,9,13( ),( ).(2)2,4,6,10,16,( ),( ).(3) 16,4,
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(1)3,4,6,9,13(18 ),(24 ).1 2 3 4 5 6 相邻两项做差,形成等差数列 (2)2,4,6,10,16,(26 ),(42 ).第N项=前两项之和 (3) 16,4,1,1/4 (1/16 ) (1/64 )相邻两项相除=4 (4)8,2,11,2,14,2,(17 ) ,(2 ) 奇项为公差为3的等差数列,偶项都为2