Chứng tỏ rằng 1/31+1/32+1/33+.......+1/149+1/150<13/6
\(S=\frac{1}{31}+\frac{1}{32}+\frac{1}{33}+...+\frac{1}{100}\). Chứng minh : \(S<\frac{7}{3}\)
Chứng tỏ :\(\frac{23}{34}<\frac{1}{31}+\frac{1}{32}+\frac{1}{33}+...+\frac{1}{70}<\frac{4}{3}\)
Chưng minh rằng:\(\frac{23}{34}<\frac{1}{31}+\frac{1}{32}+\frac{1}{33}+...+\frac{1}{70}<\frac{4}{3}\)
Chứng minh rằng :\(\frac{23}{34}<\frac{1}{31}+\frac{1}{32}+\frac{1}{33}+...+\frac{1}{70}<\frac{4}{3}\)
So sánh M = \(\frac{1}{31}+\frac{1}{32}+\frac{1}{33}+...+\frac{1}{60}\) và \(\frac{4}{5}\)
HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Chứng minh rằng: H = \(\frac{1}{31}+\frac{1}{32}+\frac{1}{33}+....+\frac{1}{2048}\)> 3
Bài siêu dễ cho mấy bạn đây.
Cho S =\(\frac{1}{31}+\frac{1}{32}+\frac{1}{33}+...+\frac{1}{60}\)Chứng minh rằng \(\frac{3}{5}\)<S<\(\frac{4}{5}\)
Cho A= \(\frac{1}{31}+\frac{1}{32}+\frac{1}{33}+...+\frac{1}{59}+\frac{1}{60}\)
chứng minh rằng: \(\frac{3}{5}\)<A < \(\frac{4}{5}\)