tính: 1/6.10 + 1/7.9 + 1/8.8 + 1/9.7 + 1/10.6
Tinh A : B
Cho A = 1/1.2+1/3.4+1/5.6+...+1/9.10 va B =1/6.10+1/7.9+1/8.8+1/9.7+1/10.6
\(\frac{1}{6.10}+\frac{1}{7.9}+\frac{1}{8.8}+\frac{1}{9.7}+\frac{1}{10.6}=\)?
A=1/ 6.10+1/ 7.9+1/ 8.8+1/ 9.7+1/ 10.6
Chứng minh rằng: A=1/8. (1/6+1/7+1/8+1/9+1/10)
A=1/ 6.10+1/ 7.9+1/ 8.8+1/ 9.7+1/ 10.6
Chứng minh rằng: A=1/8. (1/6+1/7+1/8+1/9+1/10)
Tính A : B biết:
\(A=\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+\frac{1}{7.8}+\frac{1}{9.10}\) và \(B=\frac{1}{6.10}+\frac{1}{7.9}+\frac{1}{8.8}+\frac{1}{9.7}+\frac{1}{10.6}\)
Tính Tỉ Số A và B biết :
A = \(\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+.....+\frac{1}{9.10}\)
B = \(\frac{1}{6.10}+\frac{1}{7.9}+\frac{1}{8.8}+\frac{1}{9.7}+\frac{1}{10.6}\)
1) Cho :
A= 1/(1.2)+1/(3.4)+1/(5.6)+...+1/(9.10) va B= 1/(6.10)+1/(7.9)+1/(8.8)+1/(7.9)+1/(10.6)
Tinh A:B
2) Cho P= (1/2).(3/4).(5/6). ... .(99/100). CMR: 1/15< P<1/10
Cho A = \(\frac{1}{1.2}\) + \(\frac{1}{3.4}\) + \(\frac{1}{5.6}\) + . . . + \(\frac{1}{9.10}\)
B = \(\frac{1}{6.10}\) + \(\frac{1}{7.9}\) + \(\frac{1}{8.8}\) + \(\frac{1}{9.7}\) + \(\frac{1}{10.6}\) Tính \(\frac{A}{B}\)
