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1.2 Coordonnées cartésiennes

OM⃗ = x ⃗ex + y⃗ey + z ⃗ez.
(1.3)

⃗v = ˙x⃗ex + ˙y⃗ey + ˙z⃗ez.
(1.4)

⃗γ = ¨x⃗ex + ¨y⃗ey + ¨z⃗ez.
(1.5)

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