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[数论] 2024清华强基整数倒数成等差

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郝酒 Posted 2024-10-22 12:18 From mobile phone |Read mode

$a,b,c\in\{1,2,\cdots,100\}$，求满足$a>b>c$且$\frac{1}{a}+\frac{1}{c}=\frac{2}{b}$的三元组个数.

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Aluminiumor Posted 2024-10-22 16:47

兰琦老师的解法

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谢谢，我看到了兰琦老师的解法，很清晰.想问一下有没有其他看的方式. Posted 2024-10-22 23:25

Wir müssen wissen, wir werden wissen.

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