bạn nhân cả tử và mẫu vs 2, 3, 4, 5,...
ta có : \(\frac{1}{2}=\frac{1.2}{2.2}=\frac{2}{4}\)
\(\frac{1}{2}=\frac{1.3}{2.3}=\frac{3}{6}\)
\(\frac{1}{2}=\frac{1.4}{2.4}=\frac{4}{8}\)
\(\frac{1}{2}=\frac{1.5}{2.5}=\frac{5}{10}\)
\(\frac{1}{2}=\frac{1.6}{2.6}=\frac{6}{12}=\frac{1}{12}+\frac{2}{12}+\frac{3}{12}=\frac{1}{12}+\frac{1}{6}+\frac{1}{4}\)
Vậy \(\frac{1}{2}=\frac{1}{12}+\frac{1}{6}+\frac{1}{4}\)
\(\frac{1}{2}=\frac{1}{6}+\frac{1}{5}+\frac{2}{15}\)
\(\frac{1}{2}=\frac{1}{18}+\frac{5}{18}+\frac{1}{6}\)
Còn nhìu lém
^.^
