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juju18MAI
@juju18MAI
June 2021
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Anatole affirme: "Pour tout nombre entier positif n, l'expression n² - 24n + 144 est toujours différente à 0"
a-t-il raison?
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nonotata
N² -24n +144
est une identite remarquable de la forme (a-b)² =a²-2ab+b²
donc
n²-24n+144
n²-24n -12²
(n-12)²
n -12 = 0
n = 12
non car si n =12 l expression est egale a 0
(12)² -24(12) +144
144 -288 +144
0
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Lista de comentários
est une identite remarquable de la forme (a-b)² =a²-2ab+b²
donc
n²-24n+144
n²-24n -12²
(n-12)²
n -12 = 0
n = 12
non car si n =12 l expression est egale a 0
(12)² -24(12) +144
144 -288 +144
0