小學生數學題 65
所有跟帖:
• 右邊=(n-1)(n^(n-2)+...+1), 第二個因式共n-1項,每一項=1 (mod n-1), 即第二個因式也能被n- -萬斤油- ♂ (0 bytes) () 10/18/2014 postreply 08:33:37
• 妙。也可二項展開 -亂彈- ♂ (0 bytes) () 10/18/2014 postreply 11:45:26
• 右邊=(n-1)(n^(n-2)+...+1), 第二個因式共n-1項,每一項=1 (mod n-1), 即第二個因式也能被n- -萬斤油- ♂ (0 bytes) () 10/18/2014 postreply 08:33:37
• 妙。也可二項展開 -亂彈- ♂ (0 bytes) () 10/18/2014 postreply 11:45:26
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