Các câu hỏi tương tự
\(\frac{-5}{10}.\frac{-4}{10}.\frac{-3}{10}......\frac{3}{10}.\frac{4}{10}.\frac{5}{10}\)
\(A=\frac{10}{20}+\frac{10}{80}+\frac{10}{176}+\frac{10}{308}+\frac{10}{476}+\frac{10}{680}\)
A=\(\frac{10}{1.2}+\frac{10}{2.3}+\frac{10}{3.4}+...+\frac{10}{98.99}+\frac{10}{99.100}\)
tính nhanh. \(\frac{10}{6}+\frac{10}{12}+\frac{10}{20}+\frac{10}{30}+\frac{10}{42}+...+\frac{10}{110}\)
\(\frac{9}{10}+\frac{9}{10^2}+\frac{9}{10^3}+...+\frac{9}{10^{10}}\)
so sánh
\(\frac{100}{10^{11}}+\frac{100}{10^{12}}va\frac{99}{10^{11}}+\frac{101}{10^{12}}\)
\(\frac{10^{10}+1}{10^{11}+1}va\frac{10^{11}+1}{10^{12}+1}\)
Tính B=\(\frac{10}{56}+\frac{10}{140}+\frac{10}{260}+.....+\frac{10}{1400}\)
\(A=\frac{7}{10}+\frac{7}{10^2}+\frac{7}{10^3}+...+\frac{7}{10^{2019}}\)
Tính tổng:
S = \(\frac{10}{56}+\frac{10}{120}+\frac{10}{260}+...+\frac{10}{1400}\)
\(A=\frac{10}{56}+\frac{10}{140}+\frac{10}{260}+...+\frac{10}{1400}\)