Question

[2015]

chung minh rang : 

\(\frac{1}{5}+\frac{1}{6}+\frac{1}{7}+.........+\frac{1}{17}

Answer 1

[Đinh Tuấn Việt]

\(\frac{1}{5}+\frac{1}{6}+\frac{1}{7}+...+\frac{1}{17}