题目内容
按规律填数.
(1)2.1,3.2,4.3,5.4,
(2)0.1,0.101,0.101001,0.1010010001,
(1)2.1,3.2,4.3,5.4,
6.5
6.5
,7.6
7.6
.(2)0.1,0.101,0.101001,0.1010010001,
0.101001000100001
0.101001000100001
.分析:(1)数列中的数依次增加1.1;
(2)在小数的末尾依次比前一个小数多添加一个01、001、0001、00001…;据此解答写数即可.
(2)在小数的末尾依次比前一个小数多添加一个01、001、0001、00001…;据此解答写数即可.
解答:解:(1)2.1,3.2,4.3,5.4,6.5,7.6.
(2)0.1,0.101,0.101001,0.1010010001,0.101001000100001.
故答案为:(1)6.5;7.6;(2)0.101001000100001.
(2)0.1,0.101,0.101001,0.1010010001,0.101001000100001.
故答案为:(1)6.5;7.6;(2)0.101001000100001.
点评:此题主要考查数列中的规律,关键是找出规律,再利用规律写数.
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