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Sagot :

LAFLO

Ba m = 55

Car m=1+2+3+4+5+6+7+8+9

M = 10+ (9+1) +(8+2) +(7+3) + (6+4) +5 

m= 10+10+10+10+10 +5 

m = 50+5

m=55

Voilà

 

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