is n an odd integer?
1) n is divisible by 3
2) 2n is divisible by twice as many positive integers as n
2n的因子是n的因子的两倍,第二句话我怎么怎么想都不是前面这意思
2n is divisible by twice as many positive integers as n is divisible by.呵呵似乎变成语法题目了.
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