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Sagot :

VINS

Bonjour

E = - 1/ 2 + 1/3 - 1/4 + 1/5 - 1 /6

E = - 12/24 + 8/24 - 6 /24 + 1/5 - 4 /24

E = - 14/24 + 1 /5

E = -  7/12 + 1/5

E = - 35/60 + 12/60

E =  -  23/60

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