giai dum bai nay nha cac ban ( ai muon dau dai hoc thi nhao vo)

T

tiger3323551

[tex] A \in d_{1} =>A(a,-a-1);B \in d_{2} =>B(b;2b-1)[/tex]
[tex]2\vec{MA}+\vec{MB}=\vec{0}[/tex]
[tex]<=>2\vec{MA}=-\vec{MB}[/tex]
hoành = hoành ;tung=tung
[tex]\left\begin\{2a-1=1-b\\{-2a=-2b}[/tex]
 
You must log in or register to reply here.
Top Bottom