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Meilleure réponse !
2014-04-24T14:39:52+02:00
Bonjour

A = (3/4)² = 9/16
B = 1 - 5² / (1-5)² = 1 -25 / -4² = -24 : 16 = - 1.5
C = 5²/-3 = 25/-3 = - 25/3
D = (-5)²/ (-2)³  = 25 : -8 = - 25/8
E = (1/2 -3/4) x (16/9) = (2/4 - 3/4) x 16/9 = -1/4 x 16/9 = - 16/36 = - 4/9
F = 1/2 -3/4 x 16/9 = 1/2 - 48/36 = 18/36 - 48/36 = - 38/36 = - 19/18
G = 1/5 -3/10 x 1/6 +1/2 = 1/5 - 3/60 +1/2 = 12/60 - 3/60 + 30/60 = 39/60 = 13/20
H = (1/5 -.3/10) x (1/6 +1/2) = (2/10 -3/10) x ( 1/6 + 3/6) = -1/10 x 4/6 = -  4/60 = -1/15
J = (1/8 -7/12) : (7/6 + 7/16) = (3/24 - 14/24) : (56/48 + 21/48) = - 11/24 x 77/48 = - 847/1152