bonsoir;
n impair: 2n+1
(2n+1) (2n+1) (2n+1)
= (4n² +4n+1) (2n+1)
8n³ +4n² + 8n² +4n+2n+1
= 8n³ +12n² +4n +1
8n ³ : pair
12n² : pair
4n: pair
+1 le rend impair
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bonsoir;
n impair: 2n+1
(2n+1) (2n+1) (2n+1)
= (4n² +4n+1) (2n+1)
8n³ +4n² + 8n² +4n+2n+1
= 8n³ +12n² +4n +1
8n ³ : pair
12n² : pair
4n: pair
+1 le rend impair