\(A=\sqrt[3]{am^2+bn^2+cp^2}=\sqrt[3]{\frac{am^3}{m}+\frac{bn^3}{n}+\frac{cp^3}{p}}=\sqrt[3]{am^3\left(\frac{1}{m}+\frac{1}{n}+\frac{1}{p}\right)}\)
\(\Rightarrow A=\sqrt[3]{am^3}=m\sqrt[3]{a}\Rightarrow\frac{A}{m}=\sqrt[3]{a}\)
Tương tự :.. \(\Rightarrow A\left(\frac{1}{m}+\frac{1}{p}+\frac{1}{n}\right)=\sqrt[3]{a}+\sqrt[3]{b}+\sqrt[3]{c}\)