第一次冒泡，一点点jj

ljrider

SC还能想想吗？有没有GWD?谢谢

halcyondays

（P）s和t都是n的factor，都大于1，问下面那个一定是n^st的factor？

1:S^T

2ST)^2

3:忘记了，反正不是

选择1和2，选项E

For discussion:

"s和t都是n的factor", it didn't say primary factor, thus, not necessary n=stx.

However, option 2 is still the answer: n=sx, and n=ty, n^4=(st)^2 * (xy)^2, and st >=4.

wentaow2008

  7th的方法很经典...