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anpasavines
@anpasavines
June 2021
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Chacune des 3 affirmations suivantes est-elle vraie ou fausse ? On rappelle que les réponses doivent être justifiées.
Affirmation 1:
Pour n'importe quel nombre n, (n+1)au carré - (n-1)au carré est un multiple de 4.
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Verified answer
Salut j'espère pouvoir t'aider :
(n+1)²-(n-1)² est du type a²-b²=(a+b)(a-b)
(n+1)²-(n-1)²=(n+1+n-1)(n+1-n+1)=2n*2=4n
donc multiple de 4
VOilà :D
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Verified answer
Salut j'espère pouvoir t'aider :(n+1)²-(n-1)² est du type a²-b²=(a+b)(a-b)
(n+1)²-(n-1)²=(n+1+n-1)(n+1-n+1)=2n*2=4n
donc multiple de 4
VOilà :D