谁来帮我! OGREVIEW 169,

cong828

169 if n is a positive integer and n^2 is divisible by 72,then the largest positive integer that must divide n is:

(a)6

(b)12

(c)24

(d)36

(e) 48

答案是Ｂ。不明白什么是“the largest positive integer that must divide n”解释上说“the largest positive integer that must divide thus meana finding the amallest value of K such that n^2=72k.

眼看就要考试了，做ＯＧ　数学还错！高手们，帮帮忙！．