至多隻有一個, 不管次序的話。分析可得矛盾
=(a+b)^2+(c-d)^2=(a-b)^2+(c+d)^2, 但素數的二平方和,
所有跟帖:
• 有直接的辦法,比你這個複雜一點 -魁北克人- ♂ (58 bytes) () 10/28/2014 postreply 06:23:18
• 有直接的辦法,比你這個複雜一點 -魁北克人- ♂ (58 bytes) () 10/28/2014 postreply 06:23:18
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