Question

Vreau sa stiu daca am facut corect urmatoarele sume si diferențe de vectori, aplicate intr-un paralelogram ABCD.
DA+AB=DB, BC+CD=BD, AB+BC=AC, BA+AD=BD, OD+DC=OC,OC+CB=OB,CB+BC=CO,CO+OD=CD, CO+OB=CB,AD-AB=BD,AB-AD=DB,CB-CD=DB,CD-CB=BD,DC-DA=AC,DA-DC=CA,CO-CD=DO,DO-DC=CO,DC-DO=OC

Answer 1

CB+BC = CC = 0 . In rest par ok.