Question

[Jun Mike]

1 . Cho \(\frac{a+bc}{abc}\)= \(\frac{b+ca}{bca}\)=\(\frac{c+ab}{cab}\). Chứng minh \(\frac{bc}{a}=\frac{ca}{b}=\frac{ab}{c}\)( ab , bc , ca , abc , bca , cab )