Frank Watkins
11/04/2023 · High School
2) Montrer que \( \overrightarrow{C J}=\overrightarrow{A B}+\overrightarrow{2 A D} \) et \[ \overrightarrow{C I}=\frac{1}{2} \overrightarrow{A B}-\overrightarrow{A B} \] 3) En dâchire que ls pints \( C \) I Iet J
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1. Montrer \( \overrightarrow{C J} = \overrightarrow{A B} + 2 \overrightarrow{A D} \) en utilisant les coordonnées des points.
2. Montrer \( \overrightarrow{C I} = \frac{1}{2} \overrightarrow{A B} - \overrightarrow{A B} \) en utilisant les définitions des vecteurs.
3. Démontrer que les points \( C \), \( I \) et \( J \) sont colinéaires en montrant que \( \overrightarrow{C I} \) et \( \overrightarrow{C J} \) sont proportionnels.
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