October 2020 0 21 Report
Bonjour, pouvez vous m'aider svp? Ex 1: n(n+1) est pair, determiner la parité du nombre n²+7n+13

Ex2: (n+1)(n+2)+1 = n²+3n+3, en deduire que n²+3n+3 est impair

MERCI
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