Question

hãy so sánh 1/2 với 1/11+1/12+1/13+1/14+1/15

Answer 1

\(\frac{1}{11}+\frac{1}{12}+\frac{1}{13}+\frac{1}{14}+\frac{1}{15}\)

\(< \frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}\)

\(=\frac{5}{10}=\frac{1}{2}\)