\(\frac{1}{13}+\frac{3}{13}+\frac{5}{13}+\frac{7}{13}+\frac{9}{13}+\frac{11}{13}\)
\(=\frac{1+3+5+7+9+11}{13}\)
\(=\frac{36}{13}\)
\(\frac{1}{13}+\frac{3}{13}+\frac{5}{13}+\frac{7}{13}+\frac{9}{13}+\frac{11}{13}\)
\(=\frac{1+3+5+7+9+11}{13}\)
\(=\frac{36}{13}\)
=\(\frac{1+3+5+7+9+11}{13}\)
=\(\frac{36}{13}\)
\(\frac{1}{13}+\frac{3}{13}+\frac{5}{13}+\frac{7}{13}+\frac{9}{13}++\frac{11}{13}\)
= \(\frac{1+3+5+7+9+11}{13}\)
=\(\frac{36}{13}\)
\(\frac{1+3+5+7+9+11}{13}\)
=\(\frac{\left(11+1\right)+\left(3+9\right)+\left(7+5\right)}{13}\)
=\(\frac{12\cdot3}{13}\)
=\(\frac{36}{13}\)
\(\frac{1}{13}+\frac{3}{13}+\frac{5}{13}+\frac{7}{13}+\frac{9}{13}+\frac{11}{13}\)
\(=\frac{1}{13}.\left(1+3+5+7+9+11\right)\)
\(=\frac{1}{13}.\frac{\left(11+1\right).6}{2}\)
\(=\frac{1}{13}.\frac{12.6}{2}\)
\(=\frac{1}{13}.36\)
\(=\frac{36}{13}\)
Tham khảo nhé~
\(=\left(\frac{1}{13}+\frac{9}{13}\right)+\left(\frac{3}{13}+\frac{7}{13}\right)+\left(\frac{5}{13}+\frac{11}{13}\right)\)
\(=\frac{10}{13}+\frac{10}{13}+\frac{16}{13}\)
\(=\frac{36}{13}\)