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  • 14-01-2023
  • Mathematics
contestada

On considère l'expression suivante définie pour tout n∈Z par U(n)=n
2
+14n+33.
1. Parmi les expressions suivantes, une seule n'est pas égale à U(n), laquelle ?
a. (n+7)
2
−16
b. n(n+14)+33
c. n
2
+33
d. (n+3)(n+11)

2. En choisissant la forme qui convient, calculer U(0), U(−3), U(−11) et U(−7).

3. Résoudre U(n)=0.

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