Question

[duong quang thang]

CHỨNG MINH  1-(1/5 +1/13 +1/14+1/15+1/61 +1/62 +1/63) > 1/2

Answer 1

[Trần Thị Loan]

\(đpcm\Leftrightarrow\frac{1}{5}+\frac{1}{13}+\frac{1}{14}+\frac{1}{15}+\frac{1}{61}+\frac{1}{62}+\frac{1}{63}