Question

giải thích ra giúp mik nhé

Answer 1

a: \(=\dfrac{1}{7}\left(\dfrac{-3}{8}-\dfrac{13}{8}\right)=-\dfrac{2}{7}\)

b: \(=\dfrac{1}{12}+\dfrac{1}{6}+\dfrac{1}{4}=\dfrac{1+2+3}{12}=\dfrac{6}{12}=\dfrac{1}{2}\)

c: \(=\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{6}+\dfrac{1}{23}=1+\dfrac{1}{23}=\dfrac{24}{23}\)