Question

Punctele A B C verifica AB+2AC=O ( vectori ) Calculati BC/AC

Answer 1

AB+2AC=0 deci AB=-2AC rejulta ca vectori sunt coliniari de directii opuse si A este intre B si C BA=2AC$\frac{BC}{AC}= \frac{BA+AC}{AC} = \frac{2AC+AC}{AC} =3$.