2x=1/11-1/13.........................-1/53-1/55+3/11
2x=1/11-1/55+3/11
2x=19/55
x=19/55 chia 2
x=19/110
2x=1/11-1/13.........................-1/53-1/55+3/11
2x=1/11-1/55+3/11
2x=19/55
x=19/55 chia 2
x=19/110
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 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)
\(x-\left(\frac{20}{11.13}+\frac{20}{13.15}+\frac{20}{15.17}+...+\frac{20}{53.55}\right)=22\)
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!!! >.<
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 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 x:
a) x - \(\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}-...-\frac{20}{53.55}=\frac{3}{11}\)
b) \(\frac{2}{42}+\frac{2}{56}+\frac{2}{72}+...+\frac{2}{x\left(x+1\right)}=\frac{2}{9}\left(x\in N\cdot\right)\)