Bright Elliott
10/23/2023 · Senior High School
Soit \( A B C \) un triangle. \( I \) est le milieu de \( [A B] \). 1 construire le point \( J \) tel que \( \overrightarrow{A J}=-\overrightarrow{A C} \). 2 montrer que \( \overrightarrow{I J}=-\frac{1}{2} \overrightarrow{A B}-\overrightarrow{A C} \)
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1. Construire \( J \) sur la prolongation de \( AC \) à une distance égale de \( A \) à \( C \).
2. Montrer que \( \overrightarrow{IJ} = -\frac{1}{2} \overrightarrow{AB} - \overrightarrow{AC} \).
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