回複：Problem 6

來源: 於 2009-07-27 18:18:33 [舊帖] [給我悄悄話] 本文已被閱讀：次

Choosing a1, a2, …, a(n) such that a1+a2+…a(n) is not equal to b(n-1) is not enough to apply the induction. If b(n)