Question

Answer 1

Ai giúp mình với mình cần gấp lắm

Answer 2

a)
\(\dfrac{14}{10}=\dfrac{21}{15};\dfrac{15}{10}=\dfrac{21}{14};\dfrac{14}{21}=\dfrac{10}{15};\dfrac{15}{21}=\dfrac{10}{14}\)
\(\dfrac{AB}{2}=\dfrac{CD}{3};\dfrac{3}{2}=\dfrac{CD}{AB};\dfrac{2}{3}=\dfrac{AB}{CD};\dfrac{2}{AB}=\dfrac{3}{CD}\)
\(\dfrac{AB}{EF}=\dfrac{GH}{CD};\dfrac{CD}{EF}=\dfrac{GH}{AB};\dfrac{CD}{GH}=\dfrac{EF}{AB};\dfrac{AB}{GH}=\dfrac{EF}{CD}\)
\(\dfrac{4}{5}=\dfrac{AB}{MN};\dfrac{MN}{5}=\dfrac{AB}{4};\dfrac{5}{4}=\dfrac{MN}{AB};\dfrac{5}{MN}=\dfrac{4}{AB}\)