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1.- On considère les éléments de
U₂ = (6, 12),
U₁ = (0,-4)
U₁ = (-3, 8),
U₂ = (a.-7),
1) Calculer:
a) U₁+U₂
c) U₂+U₂+U₂
e) 30₁ +50₂-12U,
170, +4U₂ + 110,
b)-70₂
d) 20₁ - 30₂
IR¹:

Sagot :

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