Các câu hỏi tương tự
\(x-\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}-...-\frac{20}{53.55}=\frac{3}{11}\)
Tìm x
\(x-\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}-...-\frac{20}{53.55}=\frac{3}{11}\)
Tìm x
\(x-\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}-...-\frac{20}{53.55}=\frac{3}{11}\)
tìm x \(\in\)N \(x\)- \(\frac{20}{11.13}\)-\(\frac{20}{13.15}\)- \(\frac{20}{15.17}\)-.........- \(\frac{20}{53.55}\)=\(\frac{3}{11}\)
\(x-\frac{20}{11.13}-\frac{20}{13.15}....-\frac{20}{53.55}=\frac{3}{11}\)
\(^{x-\frac{20}{20.13\frac{ }{ }}-\frac{20}{13.15}-\frac{20}{15.17}}\)
Bài 1: Tìm x;x - frac{20}{11.13} - frac{20}{13.15} -...- frac{20}{53.55} frac{3}{11}frac{1}{21}+frac{1}{28}+frac{1}{36}+...+frac{2}{x.left(x+1right)}frac{2}{9}Bài 2: Tìm A biết:A frac{7}{10}+frac{7}{10^2}+ frac{7}{10^3}+......
Đọc tiếp
Bài 1: Tìm x;
x - \(\frac{20}{11.13}\) - \(\frac{20}{13.15}\) -...- \(\frac{20}{53.55}\) = \(\frac{3}{11}\)
\(\frac{1}{21}+\frac{1}{28}+\frac{1}{36}+...+\frac{2}{x.\left(x+1\right)}=\frac{2}{9}\)
Bài 2: Tìm A biết:
A= \(\frac{7}{10}\)+\(\frac{7}{10^2}\)+ \(\frac{7}{10^3}\)+......
CAU 1)\(\frac{X+Y}{z}=\frac{y+z}{x}=\frac{x+z}{y}\)
Khi đó x+y=kz Khi đó K=
CAU 2)Tìm X biết :
\(\frac{x+2}{10^{10}}+\frac{x+2}{11^{11}}+\frac{x+2}{12^{12}}+\frac{x+2}{13^{13}}\)
X =
CAU 3)tÍNH
\(S=\frac{1}{2}-\frac{1}{3}-\frac{1}{4}-...-\frac{1}{20}+\frac{3}{2}+\frac{4}{3}+\frac{5}{4}+...+\frac{21}{20}=\)
Tìm x biết :
a) \(\frac{x+11}{10}+\frac{x+21}{20}+\frac{x+31}{30}=\frac{x+41}{40}+\frac{x+101}{50}\)
b) \(\frac{x+2}{42}+\frac{x+4}{22}=\frac{x+5}{23}+\frac{x+3}{43}\)
c) \(\frac{x-10}{20}+\frac{x-20}{10}+\frac{x-30}{5}=\frac{x-14}{4}\)