Các câu hỏi tương tự
tinh
\(\left(\frac{1}{51}+\frac{1}{52}+\frac{1}{53}+....+\frac{1}{100}\right)\) : \(\left(\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+.....+\frac{1}{99.100}\right)\)
A = \(\left(\frac{1}{51}+\frac{1}{52}+\frac{1}{53}+...+\frac{1}{100}\right):\left(\frac{1}{1.2}+\frac{1}{3.4}+....+\frac{1}{99.100}\right)\)
tim x biet:
: \(\left(\frac{1}{1.2}+\frac{1}{3.4}+...+\frac{1}{99.100}\right).x=\frac{2012}{51}+\frac{2012}{52}+...+\frac{2012}{99}+\frac{2012}{100}\)
Tính:
\(P=\frac{\frac{1}{51}+\frac{1}{52}+...+\frac{1}{100}}{\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+...+\frac{1}{99.100}}\)
Tính E=\(\frac{\frac{1}{51}+\frac{1}{52}+\frac{1}{53}+....+\frac{1}{100}}{\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+....+\frac{1}{99.100}}\)
Tính \(E=\frac{\frac{1}{51}+\frac{1}{52}+\frac{1}{53}+....+\frac{1}{100}}{\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+..+\frac{1}{99.100}}\)
CMR: \(\frac{1}{1.2}+\frac{1}{3.4}\)\(+\frac{1}{5.6}+...+\frac{1}{99.100}=\frac{1}{51}+\frac{1}{52}\)\(+\frac{1}{53}+...+\frac{1}{100}\)
tinh tong D= \(\frac{\frac{1}{51}+\frac{1}{52}+\frac{1}{53}+....+\frac{1}{100}}{\frac{1}{2}+\frac{1}{3.4}+\frac{1}{5.6}+...+\frac{1}{99.100}}\)
Tính tích :
B=\(\left(\frac{1}{1.2}-1\right)\left(\frac{1}{2.3}-1\right)\left(\frac{1}{3.4}-1\right).....\left(\frac{1}{99.100}-1\right)\)