Réponse :
Explications étape par étape
Bonsoir
A = 1/3 - 1/3 x 4/7
A = 1/3 - 4/21
A = 7/21 - 4/21
A = 3/21
A = 1/7
B = 6/5 / (1/15 - 1/5)
B = 6/5 / (1/15 - 3/15)
B = 6/5 / (-2/15)
B = 6/5 x -15/2
B = -15/5 x 6/2
B = -3 x 3
B = -9
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Réponse :
Explications étape par étape
Bonsoir
A = 1/3 - 1/3 x 4/7
A = 1/3 - 4/21
A = 7/21 - 4/21
A = 3/21
A = 1/7
B = 6/5 / (1/15 - 1/5)
B = 6/5 / (1/15 - 3/15)
B = 6/5 / (-2/15)
B = 6/5 x -15/2
B = -15/5 x 6/2
B = -3 x 3
B = -9