Question

Tìm \(A\) biết \(A=\frac{a}{b+c}=\frac{b}{a+c}=\frac{c}{a+b}\)

Answer 1

Ta có :

\(A=\frac{a}{b}+c=\frac{b}{a}+c=\frac{c}{a}+b\)

\(\Leftrightarrow A=\frac{a+b+c}{2}.\left(a+b+c\right)\)

\(\Leftrightarrow A=\frac{1}{2}\)

chúc bạn học giỏi

Answer 2

\(A\)\(=\)\(\frac{a}{b}\)\(+\)\(c\)\(=\)\(\frac{c}{a}\)\(+\)\(B\)

\(\Leftrightarrow\)\(A=\frac{a+b+c}{2}\)\(.\)\(\left(a+b+c\right)\)

\(\Leftrightarrow\)\(A=\frac{1}{2}\)

Answer 3

\(A=\frac{a}{b+c}=\frac{b}{a+c}=\frac{c}{a+b}\)

\(\Leftrightarrow A=\frac{a+b+c}{2}.\left(a+b+c\right)\)

\(\Leftrightarrow A=\frac{1}{2}\)

Answer 4

A=1/2 nha ban