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Sagot :

Bonjour

a. R = 2/15 x 7/3 = 14/45

b. S = 9/4 x 7/5 = 63/20

c. T = 11/2 x 4/5 = 44/10 = (2 x 22) / (2 x 5) = 22/5

d. 3 x 5/2 = 15/2.

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