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sonicmastaex
@sonicmastaex
October 2021
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bonjour, j'ai un devoir de math, aidées moi svp.
20 point car c'est difficile
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gert
Salut ,
1) calcul de a:
dans le triangle NMJ:
OH/JM=NO/NJ==>a/x=3x/(5x)==>a=3x/5
2a) Dans le triangle OHB: a²+HB²=x²==>HB²=x²-9x²/25
==>HB²=16x²/25 ==>HB=4x/5
b=8x/5
b) b est un nombre rationnel et un entier si x est un multiple de 5
1 votes
Thanks 1
sonicmastaex
merci beaucoups, tu peut faire la 2?
sonicmastaex
si tu sais??
sonicmastaex
mais encore merci
gert
Désolé mais j’ai pas compris la 2
sonicmastaex
ok bah je redemanderai, mais encore merci
gert
De rien
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Lista de comentários
1) calcul de a:
dans le triangle NMJ:
OH/JM=NO/NJ==>a/x=3x/(5x)==>a=3x/5
2a) Dans le triangle OHB: a²+HB²=x²==>HB²=x²-9x²/25
==>HB²=16x²/25 ==>HB=4x/5
b=8x/5
b) b est un nombre rationnel et un entier si x est un multiple de 5