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[数论] (z)求$x!+1=y^2$所有正整数解.

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realnumber posted 2014-4-8 13:42 |Read mode
求$x!+1=y^2$所有正整数解.

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isee posted 2014-4-9 09:07
猜两组:
(4,5)
(5,121)
还有没有,不知

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其妙 posted 2014-4-9 16:37
回复 2# isee
这都猜得到啊?

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original poster realnumber posted 2014-4-9 17:32
还有$7!+1=71^2$,$x>14$太大,几何画板算不了了.

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其妙 posted 2014-4-9 17:41
回复 4# realnumber
几何画板是画图的,还有这种计算功能啊?

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original poster realnumber posted 2014-4-9 17:56
回复 5# 其妙


    当计算器算的,windows自带的也可以.

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