Question

Answer 1

Sửa đề: \(A=\dfrac{\dfrac{2}{3}-\dfrac{2}{5}+\dfrac{2}{10}}{\dfrac{8}{3}-\dfrac{8}{5}+\dfrac{8}{10}}+\dfrac{1}{2}\)

\(=\dfrac{2\left(\dfrac{1}{3}-\dfrac{1}{5}+\dfrac{1}{10}\right)}{8\left(\dfrac{1}{3}-\dfrac{1}{5}+\dfrac{1}{10}\right)}+\dfrac{1}{2}=\dfrac{1}{4}+\dfrac{1}{2}=\dfrac{3}{4}\)