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标题: 不懂的两道题 [打印本页]

作者: tanmagic 时间: 2005-10-12 21:42 标题: 不懂的两道题

谁能指导小弟一下两题？不胜感激

If p is the product of the integers from 1 to 30, inclusive, what is the greatest integer k for which 3^k is a factor of p?

A. 10

B. 12

C. 14

D. 16

E. 18

If p is the product of the integers from 1 to 30, inclusive, what is the greatest integer k for which 3^k is a factor of p?

A. 10

B. 12

C. 14

D. 16

E. 18

作者: sammen 时间: 2005-10-13 11:44

1)其实就是找出含3这因子的数,3=3*1,6=2*3,9=3*3...以次类推,最后数一下有几个3.

楼主贴的题目是不是贴重复啦?

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