February 2021 0 67 Report
A) vérifier les égalités ( ° veut dire puissance de ) 1+2 = 2 ° 2 -1 1+2+2 ° 2 + 2 ° 3 = 2 ° 4 -1



1+2+2°2= 2°3-1 1+2+2°2 + 2°3 + 2°4 = 2°5 -1


b) En utilisant l'égalité

1+2+2°2 + 2°3 + 2°4 = 2°5 -1

montrer que : 1+2 +2°2 + 2°3 +2°4+2°5 = 2°6 -1
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