PERP上的题,不知道怎么做,求指教作者: sdcar2010 时间: 2011-3-27 11:11
2. n has a factor of 5, so p could be 5 and q could be 5. If p is 5, p^2 has a factor of 25. If q is 5, q^2 has a factor of 25. Combined together, p^2q^2 must have a factor of 25.作者: fanxinchao 时间: 2011-3-27 12:19
明白了,谢谢