a= 1/4+1/5 b= 1/6+5/18+7/12 c= 1/3+1/2+4/6+9/3-20/5-4/8
Mathématiques
cacahuete62
Question
a= 1/4+1/5
b= 1/6+5/18+7/12
c= 1/3+1/2+4/6+9/3-20/5-4/8
b= 1/6+5/18+7/12
c= 1/3+1/2+4/6+9/3-20/5-4/8
2 Réponse
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1. Réponse coco689
a= 9/20 b= 1 et 1/36 c= 0 -
2. Réponse Maryam98
A = 1/4 + 1/5 = 5/20 + 4/20 = 9/20
B= 1/6 + 5/18 + 7/12 = 6/36 + 10/36 + 21/36 = 37/36
C= 1/3 + 1/2 + 4/6 + 9/3 - 20/5 - 4/8 = 10/3 + 1/2 + 4/6 - 20/5 - 1/2
= 20/6 + 4/6 - 20/5
= 24/6 - 20/5
= 120/30 - 120/30
= 0
En espérant t'avoir aidé! =)