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romscout
@romscout
January 2021
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Bonjour , pouvez vous m'aider a faire cet exercice de calcul littéral .
a. Effectuer les calculs ci-dessous .
. 2 fois 4 -3² . 7 fois 9-8² . 11 fois 13-12²
b. Emettre une conjecture sur le résultat de la différence (n-1) (n+1) -n² , si n est un entier .
c. Prouver que cette conjecture est vraie .
MERCI de votre AIDE !
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winner123
Verified answer
8 - 9 = - 1
63 - 64 = - 1
143 - 144 = - 1
( n - 1) ( n + 1) - n² = n² - 1 - n² =
- 1
2 votes
Thanks 2
romscout
Merci bcp mais tu peut faire le c. stp ?
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Verified answer
8 - 9 = - 163 - 64 = - 1
143 - 144 = - 1
( n - 1) ( n + 1) - n² = n² - 1 - n² = - 1