Question

Thực hiện phep tính một các hợp lý:

\(\left(\frac{2}{3}+\frac{2}{5}-\frac{2}{9}\right):\left(\frac{4}{3}+\frac{4}{5}-\frac{4}{9}\right)-\left(3-\frac{3}{11}-\frac{3}{17}\right):\left(5-\frac{5}{11}-\frac{5}{17}\right)\)

Answer 1

\(\frac{\frac{2}{3}+\frac{2}{5}-\frac{2}{9}}{\frac{4}{3}+\frac{4}{5}-\frac{4}{9}}\) _  \(\frac{3-\frac{3}{11}-\frac{3}{17}}{5-\frac{5}{11}-\frac{5}{17}}\)

=\(\frac{2\left(\frac{1}{3}+\frac{1}{5}-\frac{1}{9}\right)}{4\left(\frac{1}{3}+\frac{1}{5}-\frac{1}{9}\right)}\)_ \(\frac{3\left(1-\frac{1}{11}-\frac{1}{17}\right)}{5\left(1-\frac{1}{11}-\frac{1}{17}\right)}\)= \(\frac{2}{4}-\frac{3}{5}\)= \(\frac{-1}{10}\)