8.16 1) Supposons que −AB =−−−→
−−−−−−−→
A′B′
−−−−−−→
AA′ =−AB +−−−→
−−−−−→
BA′ =
−−−−−−−→
A′B′+
−−−−−→
BA′ =
−−−−−→
BA′+
−−−−−−−→
A′B′ =
−−−−−→
BB′
2) Supposons que −AA−−−−−→′ =
−−−−−→
BB′
−−−−→
AB =
−−−−−−→
AA′+
−−−−−→
A′B =
−−−−−→
BB′+
−−−−−→
A′B =
−−−−−→
A′B +
−−−−−→
BB′ =
−−−−−−−→
A′B′
Géométrie : vecteurs Corrigé 8.16