Các câu hỏi tương tự
a) A = 1/1.2+ 1/3.4+ 1/5.6+...+ 1/99.100
CMR: 7/12<A< 5/6
b) CMR: 1/1.2+ 1/3.4+ 1/5.6+...+1/49.50 = 1/26+ 1/27+ 1/28+...+1/50
Cho A=1/1.2+1/3.4+1/5.6+...+1/99.100,CMR:7/12<A<5/6
Cho: A= 1/1.2+1/3.4+1/5.6+.....+1/99.100
CMR: 7/12<A<5/6.
Cho A=1/1.2 + 1/3.4 + 1/5.6 +...+1/99.100
CMR 7/12 < A<5/6
Chứng minh 7/12< 1/1.2 + 1/3.4 +1/5.6 +...... + 1/99.100 <5/6
Cho A= 1/ 1.2+ 1/ 3.4+ 1/ 5.6+ 1/ 7.8+.... +1/99.100
CMR:7/12< A<5/6
mong các bạn giúp đỡ mình
Cho A=\(\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+....+\frac{1}{99.100}\)
CMR:\(\frac{7}{12}< A< \frac{5}{6}\)
A=\(\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+.................+\frac{1}{99.100}\)
CMR: 7/12< A< 5/6
Cho A=1/1.2+1/3.4+1/5.6+...+1/99.100
Chứng minh rằng: 7/12<A<5/6