Các câu hỏi tương tự
CHO : \(M=\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+.......+\frac{1}{97.98}+\frac{1}{99.100}\)
Chứng Minh: \(\frac{7}{12}< M< \frac{5}{6}\)
1, CMR: \(\frac{7}{12}<\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+...+\frac{1}{97.98}+\frac{1}{99.100}<\frac{5}{6}\)
2, CMR: \(\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+...+\frac{1}{47.48}+\frac{1}{49.50}=\frac{1}{26}+\frac{1}{27}+\frac{1}{28}+...+\frac{1}{49}+\frac{1}{50}\)
1. Cho A = 1/(1.2)+1/(3.4)+...+1/(99.100).
Chứng minh 7/12 < A <5/6
2.Chứng minh:
1/(1.2)+1/(3.4)+...+1/(49.50)=1/26+1/27+...+1/50
1, CMR: \(\frac{7}{12}<\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+...+\frac{1}{97.98}+\frac{1}{99.100}<\frac{5}{6}\)
2, CMR: \(\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+...+\frac{1}{47.48}+\frac{1}{49.50}=\frac{1}{26}+\frac{1}{27}+\frac{1}{28}+...+\frac{1}{49}+\frac{1}{50}\)
Cho B = \(\dfrac{1}{1.2}\)+\(\dfrac{1}{3.4}\)+\(\dfrac{1}{4.5}\)+ ... + \(\dfrac{1}{99.100}\)
Chứng minh \(\dfrac{7}{12}\)<B<\(\dfrac{5}{6}\)
Cho A=1/1.2+1/3.4+1/5.6+...+1/99.100
Chứng minh rằng: 7/12<A<5/6
Chứng minh 7/12< 1/1.2 + 1/3.4 +1/5.6 +...... + 1/99.100 <5/6
A= 1/1.2 + 1/3.4 + ... + 1/99.100 . Chứng minh rằng: 7/12 < A < 5/6
cho M=\(\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{4.5}+...+\frac{1}{99.100}\)CMR \(\frac{7}{12}\)<M<\(\frac{5}{6}\)