Réponse:
bonjour
a) 2/3 + 5/3 = 7/3
b) 3/5 - 1/10 = 6/10 - 1/10 = 5/10 = 1/2
c)2/3 + 5/4 = 8/12 + 15/12 = 23/12
d)1/2 + 1/3 + 1/4 = 12/24 + 8/24 + 6/24 = 11/24
e)7/8 - 8/3 = 21/24 - 64/24 = - 43/24
Résolution
a) x^2 = 9 donc x = -3 ou x = 3
b) x^2 = 3 donc x = -√3 ou x =√3
c)√x = 7 donc x = 49
d) 2√x + 1= 3
2√x = 2
√x = 1 alors x = 1
e) 1/x = 3 donc x = 1/3
f) 1/x = -1/5 donc x = -5
