Question

Giúp mik!!!

Answer 1

\(e,\dfrac{-11}{23}.\dfrac{6}{7}+\dfrac{8}{7}.\dfrac{-11}{23}-\dfrac{1}{23}=\dfrac{-11}{23}\left(\dfrac{6}{7}+\dfrac{8}{7}\right)-\dfrac{1}{23}=\dfrac{-11}{23}.2-\dfrac{1}{23}=\dfrac{-22}{23}-\dfrac{1}{23}=-1\)

\(f,\left(\dfrac{377}{-231}-\dfrac{123}{89}+\dfrac{34}{791}\right)\left(\dfrac{1}{6}-\dfrac{1}{8}-\dfrac{1}{24}\right)\\ =\left(\dfrac{377}{-231}-\dfrac{123}{89}+\dfrac{34}{791}\right)\left(\dfrac{4}{24}-\dfrac{3}{24}-\dfrac{1}{24}\right)\\ =\left(\dfrac{377}{-231}-\dfrac{123}{89}+\dfrac{34}{791}\right).0\\ =0\)