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Sagot :

Bonjour,

Calculer:

A= (10+5) / (10-5)= 15/5= 3

B= (4-2/3)(2-4/3)= (4x3-2)/3) (2x3-4)/3)= (12-2)/3) (6-4)/3)= (10/3) (2/3)

  = (10x2)(3x3)= 20/9

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