Sagot :
Réponse :
A= (1/3)^2= 1/9
B= 5^2/ (-5)^2= 25/25=1
C= (1-3^2)/ (1-3)^2= -8/4 = -2
D= (-5)^2 / (-3)^3 = 25/ (-27) = -25/27
E= (1+2^2) / (1+2)^2 = 5/9
F= (-1)^2 / 2^3 = 1/8
G= 1 - (1/3)^2 = 1 - 1/9 = (9-1)/9 = 8/9
H= (1-1/3)^2 = ((3-1)/3)^2 = (2/3)^2 = 4/9
Explications étape par étape
Réponse :
Explications étape par étape
A = (1/3 )²
⇔ A = 1/9 N * N D * D 1/3 * 1/3
B = 5² / (-5)²
⇔ B = 5² / 5²
⇔ B = 1
C = 1 - 3² / (1 -3)²
⇔ C = 1 - 9 / ( -2 )² ( -2 )² = 4 loi des signes - * - = +
⇔ C = -8 / 4
⇔ C = -2
D = ( -5)² / (-3 )³
⇔ D = 25 / -27
⇔ D = - 25 / 27
E = 1 + 2² / ( 1 + 2 )²
⇔ E = 1 + 4 / 3²
⇔ E = 5 / 9
F = ( -1 )² / 2³
⇔ F = 1 / 8
G = 1 - (1/3)²
⇔ G = 1 - 1/9
⇔ G = ( 9 - 1 ) / 9
⇔ G = 8/9
H = ( 1 - 1/3 )²
⇔ H = (2/3)²
⇔ H = 4/9