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Meilleure réponse !
  • Utilisateur Brainly
2014-09-07T21:47:09+02:00
11/5 - 3/4
= (11 * 4)/(5 * 4) - (3 * 5)/(4 * 5)
= 44/20 - 15/20
= 29/20

5/3 - 4/3 x 6/7
= 5/3 - (6 * 4)/(3 * 7)
= 5/3 - 24/21
= (5 * 7)/(3 * 7) - 24/21
= 35/21 - 24/21
= 11/21

 \frac{5^-^1\times(5^3)^3}{5\times5^2}  = \frac{5^-^1\times5^9}{5^3} = \frac{5^8}{5^3} =5^8^-^3=5^5
2014-09-07T22:00:31+02:00
Bonsoir



A=  
A = 44/20 - 15/20
A = 29/20


B= x
B = 5/3 - 24/21
B = 35/21 - 24/21
B = 11/21

C=


C = (5^-1 x 5^9) / 5^1+2
C = 5^-1+9 / 5^3
C = 5^8 / 5^3
C = 5^8-3
C = 5^5
C = 3125