Bonjour,
2 nbres impairs:
2n+1 et 4n+1
= 2n+1+4n+1
= 6n+2
= 2( 3n+1)
donc toujours paire
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Bonjour,
2 nbres impairs:
2n+1 et 4n+1
= 2n+1+4n+1
= 6n+2
= 2( 3n+1)
donc toujours paire