作业帮[GRE数学]If -m/19 is an even integer,which of the following mu
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[GRE数学]If -m/19 is an even integer,which of the following must be true?
问m是什么数.给出五个选项,分别是 A:negative number（负数）,B:positive number（正数）,C:prime number（质数） ,D:odd integer（奇数） ,E:even integer（偶数） .
问m是什么数.给出五个选项,分别是 A:negative number（负数）,B:positive number（正数）,C:prime number（质数） ,D:odd integer（奇数） ,E:even integer（偶数） .
E偶数啊 除以19都是偶数,那把19乘上去还是偶数.
但是正负是不能判断的,因为偶数也有正负之分,这里没说 -M/19是正是负,那就不知道了
但是正负是不能判断的,因为偶数也有正负之分,这里没说 -M/19是正是负,那就不知道了
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