Réponse :
Bonjour,
On pose 2*u = (2*2; 2*4) = (4;8)
Ainsi 2u - v = (4;8) - (-1;3) = (4-(-1) ; 8-3) = (4+1; 5) = (5;5) = w.
Bon courage.
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Réponse :
Bonjour,
On pose 2*u = (2*2; 2*4) = (4;8)
Ainsi 2u - v = (4;8) - (-1;3) = (4-(-1) ; 8-3) = (4+1; 5) = (5;5) = w.
Bon courage.