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Sagot :

TALAMASADONAI

Réponse :Bonjour,

u+v = (3+5 ; -2+2) = (8 ; 0)

u+v+w = (3+5-1 ; -2+2-4) = (7 ; -4)

2u = (2*3 ; 2*-2) = (6 ; -4)

3u - 5v = (3*3 ; -2*3) - (5*5 ; 5*2) = (9 ; -6) - (25 ; 10) = (9-25 ; -6-10) = (-16 ; -16)

Bon courage ;)

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