1.
[tex]\dfrac{MB}{AB}=\dfrac{5}{11} \Rightarrow \dfrac{\red{MB}}{AB-\red{MB}}=\dfrac{\red{5}}{11-\red{5}} \Rightarrow \dfrac{MB}{AM}=\dfrac{5}{6}[/tex]
Intoarcem fractia si obtinem :
[tex]\dfrac{MB}{AM}=\dfrac{5}{6} \Rightarrow \red{\dfrac{AM}{MB}=\dfrac{6}{5}}[/tex]
2.
[tex]\dfrac{AC}{BC}=\dfrac{1}{5} \Rightarrow BC=5AC[/tex]
[tex]AB=BC+AC=5AC+AC=6AC=24 \Big|:6[/tex]
[tex]\red{AC=4 \Rightarrow BC=5AC=5\cdot 4 =20 }[/tex]
