Bonjour vous pouvez m'aider sur ces exercices sur les vecteur

Réponse :

Ex 4

u = AB + BC + CA

u = AC + CA

u = 0

w = AB + AC + BC

w = AB + BC + AC

w = AC + AC

w = 2 AC

x = DE + FG + EF + DG

x = DE + EF + FG + DG

x = DF + FG + DG

x = DG + DG

x = 2 DG

Ex 5

v = RT - ST + RS

v = RT + TS + RS

v = RS + RS

v = 2 RS

w = AB + MA - MB + BA

w = AB + MA + BM + BA

w = AB + BA + MA + BM

w = MA + BM

w = BM + MA

w = BA

x = 2MN - MP - PQ - MQ

x = 2MN - MQ - MQ

x = 2MN - 2MQ

x = 2MN + 2 QM

x = 2QM + 2MN

x = 2QN

Ex 6

1. AB = AE + EB

2. IJ = IL + LJ

3. RT = RA + AT

4. SD = TD + ST

5. RE = SE + RS

6. CD = CK + KL + LD

7. FA = CA + FG + GC

8. AT = AB + RT BS + SR

9. AB = AJ + JK + KB

Ex 7

v = AB + AC

v = AB - CA

v = - CA + AB

v = - CB

v = BC

Explications étape par étape :