\(\frac{a+b}{c}=\frac{b+c}{a}=\frac{c+a}{b}\)
\(\frac{a+b}{c}+1=\frac{b+c}{a}+1=\frac{c+a}{b}+1\)
\(\frac{a+b+c}{c}=\frac{b+c+a}{a}=\frac{c+a+b}{b}\)
=> a=b=c hoặc a+b+c =0
nói rõ a; b;c = bao nhiêu???
a=b=c = 1
=2
=3
=4
=.....
Apdung...taco:
\(\frac{a+b}{c}=\frac{b+c}{a}=\frac{c+a}{b}=\frac{3a+3b+3c}{a+b+c}=\frac{3\left(a+b+c\right)}{a+b+c}=3\)
\(\frac{a+b}{c}=3\Leftrightarrow c=\frac{a+b}{3}\)
\(\frac{b+c}{a}=3\Leftrightarrow a=\frac{b+c}{3}\)
\(\frac{c+a}{b}=3\Leftrightarrow b=\frac{c+a}{3}\)
vay...
chua chat dung dau nhe
