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Orlaane
@Orlaane
April 2019
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A rendre pour jeudi, aidez moi, *vecteurs*
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Bonsoir,
BE=1/3BC
BA+AE= 1/3(BA+AC)
AE=1/3BA+1/3AC - BA
AE= -2/3BA+1/3AC
AE= 2/3 AB + 1/3 AC
AE= 1/3(2AB + AC)
Or AD= 2AB + AC; donc AE=1/3AD don AE et AD sont colinéaires, donc A, E et D sont alignés.
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Orlaane
June 2021 | 0 Respostas
Merci de m'aider! :)
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June 2021 | 0 Respostas
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BE=1/3BC
BA+AE= 1/3(BA+AC)
AE=1/3BA+1/3AC - BA
AE= -2/3BA+1/3AC
AE= 2/3 AB + 1/3 AC
AE= 1/3(2AB + AC)
Or AD= 2AB + AC; donc AE=1/3AD don AE et AD sont colinéaires, donc A, E et D sont alignés.