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请你按照如下的数字规律,分别写出第n个数字:①2,4,6,8,10,.;②1,3,5,7,9,.;③6,10,14,18,22,.,;④2,4,8,16,32,.,.请你按照如下的数字规律,分别写出第n个数字:①4,8,12,16,20,.;②5,9,

题目详情
请你按照如下的数字规律,分别写出第n个数字:①2,4,6,8,10,.______; ②1,3,5,7,9,.______;
③6,10,14,18,22,.,_____;
④2,4,8,16,32,.,______.
请你按照如下的数字规律,分别写出第n个数字:
①4,8,12,16,20,.______;
②5,9,13,17,21,.,______;
③2,5,8,11,14,.,______;
④1,4,9,16,25,.,______.
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答案和解析
①2,4,6,8,10,.__2n____;
②1,3,5,7,9,.__2n-1____;
③6,10,14,18,22,.,_4n+2____;
④2,4,8,16,32,.,__2^n____.
请你按照如下的数字规律,分别写出第n个数字:
①4,8,12,16,20,.__4n____;
②5,9,13,17,21,.,_4n+1_____;
③2,5,8,11,14,.,__3n-1____;
④1,4,9,16,25,.,_n^2_____.