If $\dfrac{a}{b+c} = \dfrac{b}{c+a} = \dfrac{c}{a+b}$ and $a+b+c
e 0$, then by the sum rule each ratio equals—

Question

If $\dfrac{a}{b+c} = \dfrac{b}{c+a} = \dfrac{c}{a+b}$ and $a+b+c 
e 0$, then by the sum rule each ratio equals—

Accepted Answer

$\dfrac{1}{2}$

Answer

$1$

Answer

$0$

Answer

$\dfrac{1}{3}$

If ab+c=bc+a=ca+b\dfrac{a}{b+c} = \dfrac{b}{c+a} = \dfrac{c}{a+b}b+ca​=c+ab​=a+bc​ and a+b+c≠0a+b+c \ne 0a+b+c=0, then by the sum rule each ratio equals—