link đây tham khảo nhé:
https://hoc24.vn/hoi-dap/question/207558.html
hình như bằng 8 chứ nk cx k chắc hihihi
Áp dụng tính chất dãy tỉ số bằng nhau:
\(\dfrac{2a-b+b-c+a}{a+b+2a-b}=\dfrac{2}{3}\Leftrightarrow\dfrac{3a-c}{3a}=\dfrac{2}{3}\Leftrightarrow3\left(3a-c\right)=2.3a\Leftrightarrow9a-3c=6a\Leftrightarrow9a-6a=3c\Leftrightarrow3a=3c\Rightarrow a=c\)\(\dfrac{b-c+a}{2a-b}=\dfrac{b-a+a}{2a-b}=\dfrac{b}{2a-b}=\dfrac{2}{3}\Rightarrow3b=4a-2b\Leftrightarrow3b+2b=4a\Leftrightarrow5b=4a\)
P=\(\dfrac{\left(5b+4a\right)^5}{\left(5b+4c\right)^2\left(a+3c\right)^3}=\dfrac{\left(5b+4a\right)^5}{\left(5b+4a\right)^2\left(a+3a\right)^3}=\dfrac{32768a^5}{64a^2.64a^3}=8\)