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Sagot :

Explications étape par étape:

exercice 52

a = 19 / 60

b = 17 /12

exercice 53

a = 41 / 35

b = 71 / 35

exercice 54

a = 46 / 63

b = - 31 / 24

c = - 71 / 45

d = 11 / 9

e = - 4 / 3

f = 15 / 4

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