x - \(10\left(\frac{2}{11.13}+\frac{2}{13.15}+..+\frac{2}{53.55}\right)=22\)
\(x-10\left(\frac{1}{11}-\frac{1}{13}+\frac{1}{13}-\frac{1}{15}+..+\frac{1}{53}-\frac{1}{55}\right)=22\)
\(x-10\left(\frac{1}{11}-\frac{1}{55}\right)=22\)
\(x-10\cdot\frac{4}{55}=22\)
\(x-\frac{40}{55}=22\)
\(x=22+\frac{40}{55}=\frac{250}{11}\)
x-\(\left(\frac{20}{11.13}+\frac{20}{13.15}+\frac{20}{15.17}+...+\frac{20}{53.55}\right)=\frac{3}{11}\)
\(\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+\frac{1}{15}+...+\frac{2}{x\left(x-1\right)}=\frac{2007}{2009}\)
Tìm x thuộc N biết:
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:
a) x - \(\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}-...-\frac{20}{53.55}=\frac{3}{11}\)
b) \(\frac{2}{42}+\frac{2}{56}+\frac{2}{72}+...+\frac{2}{x\left(x+1\right)}=\frac{2}{9}\left(x\in N\cdot\right)\)
Tìm x biết:
a,\(\frac{1}{2a^2+1}:x=2\)
b,\(x-\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}.........-\frac{20}{53.55}=\frac{3}{11}\)
c,\(\frac{1}{21}+\frac{1}{28}+\frac{1}{36}+........+\frac{2}{x\left(x+1\right)}=\frac{2}{9}\)
tìm số tự nhiên x biết :
x - \(\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}-.......-\frac{20}{53.55}=\frac{3}{11}\)
AI NHANH MIK CHO BA TICK
tìm số tự nhiên x : x-\(\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}-...-\frac{20}{53.55}=\frac{3}{11}\)
Giải chi tiết bạn nhé. Thanks nhìu. ai nhanh tui tik cho
Tìm x biết:
1)||x-2013|-2014|=2015
2)x-(\(\frac{20}{11.13}+\frac{20}{13.15}+\frac{20}{15.17}+...+\frac{20}{53.55}=\frac{3}{11}\)
(nhanh lên đc k nhỉ các bạn)
Tinh:
a) x- \(\frac{20}{15.17}-\frac{20}{17.19}-\frac{20}{19.21}-...-\frac{20}{73.75}=\frac{7}{15}\)
b) x- \(\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}-...-\frac{20}{53.55}=\frac{3}{11}\)
TICK ĐÚNG CHO AI TRẢ LỜI ĐÚNG NHẤT VÀ CHI TIẾT NHẤT!!! >.<
