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From: Dominique <zzz@aol.com>
Newsgroups: fr.sci.maths
Subject: =?UTF-8?B?UmU6IFLDqXNvdWRyZSBjZXR0ZSDDqWdhbGl0w6k=?=
Date: Tue, 6 Jun 2023 06:02:10 +0200
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Le 05/06/2023 à 21:20, Richard Hachel a écrit :
> On pose :
> 
> (1/x)+(1/y)=(1/10)
> 
> x et y entiers naturels.
> 
> Quelle(s) possibilité(s)?
> 
> R.H.

En force brute (Python3) :

for x in range (1,100000):
     for y in range(1,100000):
         if 1/x+1/y==.1:
             print(x,y)


je ne trouve que 3 couples (et leurs miroirs, bien sûr) :

11 110
15 30
20 20

qui répondent exactement à la solution 1/x+1/y=1/10. Les autres 
solutions que donne Michel ne sont pas égales à 1/10 !

-- 
Dominique
Courriel : dominique point sextant ate orange en France
Esto quod es