If n is an integer, then n is divisible by how many positive integers?(1) n is the product of two different prime numbers.(2) n and 2^3(2的三次方) are each divisible by the same number of positive integers.
答案选D,我选A。
条件2总是想不通。n和8都可以被一个正整数整除的话,我随便取n=6,那么6和8都可以被共同的2整除,但6是两个数的乘积,但我取n=40,40和8都可以被8整除,但40就是2×2×2×5四个数乘积啦,所以不能确定准确数值啊。
我想的肯定有哪个地方有问题,但自己不明白,望耐心人帮忙指点
举报
发表回复
手机版|ChaseDream|GMT+8, 2024-12-5 08:58 京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
ChaseDream 论坛
© 2003-2023 ChaseDream.com. All Rights Reserved.