Question

Tính : A = \(\dfrac{\dfrac{1}{14}-\dfrac{1}{30}-\dfrac{1}{46}}{\dfrac{2}{35}-\dfrac{2}{75}-\dfrac{2}{115}}:\dfrac{\dfrac{3}{8}-\dfrac{15}{17}+\dfrac{35}{31}}{\dfrac{1}{6}-\dfrac{20}{51}+\dfrac{40}{93}}\)

Phùng Khánh Linh , mong cj giúp đỡ

Answer 1

\(=\dfrac{\dfrac{1}{2}\left(\dfrac{1}{7}-\dfrac{1}{15}-\dfrac{1}{23}\right)}{\dfrac{2}{5}\left(\dfrac{1}{7}-\dfrac{1}{15}-\dfrac{1}{23}\right)}:\left(\dfrac{2621}{4216}:\dfrac{647}{3162}\right)\)

\(=\dfrac{5}{4}:\dfrac{7863}{2588}=\dfrac{3235}{7863}\)