regle2.py

Created by hugo37140

Created on November 21, 2021

626 Bytes

Proprietes : 
Soient u et v deux vecteurs et
x un réel.

 x(u+v) = xu+ xv
 x(xpu) = (xxp)u
 (x + xp)u = xu + xp u
 xu= 0 si et seulement si x = 0 ou
u=0

Soit u v et w
trois vecteurs de l’espace.
w est une combinaison linéaire des
vecteurs u et v
si il existe deux réels 
α et β tels que : w=αu*βv

Deux droites d et dp de l’espace 
sont coplanaires s il existe un 
plan qui les contient toutes les 
deux.

Deux droites d et dp de l espace 
sont parallèles si elles 
vérifient les deux conditions suivantes:
 
 elles sont coplanaires ;
 elles sont confondues ou n’ont
 aucun point commun.
 On note : d // dp

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