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标题: 数学一题题目求解释 [打印本页]

作者: zhouyouoil    时间: 2012-5-27 17:09
标题: 数学一题题目求解释
is the integer n odd?
(1) n is divisible by 3
(2) 2n is divisible by twice as many positive integer as n.
请问2是啥意思啊?没看明白
作者: zhouyouoil    时间: 2012-5-27 20:24
哪位大侠来解释一下哈
作者: mcpoppinj    时间: 2012-5-27 21:28
能整除2n的正整数,是能整除n的正整数的2倍,即  若n能被x个正整数整除,那么2n就能被2x个数整除。 注意,这只是题干给的条件,而非一般数学定理。  正确与否需自己研究




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