a b的最大公约数是21, a b 的最小公倍数是126, a b 都是自然数,求 a +b 的和?
翻译出来就很简单的题对吧?
126=21*2*3
你一定会问 为什么要这样写,因为题目告诉我们21和126,我们就要建立这二者的关系
那么 a b就是42和63啦..
The greatest common divisor of a and b is 21,and the least c
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