Các câu hỏi tương tự
tìm x biết
a 1/5.8+1/8.11+1/11.14+...1/x(x+3)=101/1540
b 1+1/3+1/6+1/10+...1/x(x+1)=\(1\frac{1991}{1993}\)
Tim x biet:\(\left(\frac{1}{2.5}+\frac{1}{5.8}+\frac{1}{8.11}+...+\frac{1}{65.68}\right)x-\frac{7}{34}=\frac{19}{68}\)
TIM X
\(\frac{1}{5.8}+\frac{1}{8.11}+\frac{1}{11.13}+....+\frac{1}{x\left(x+3\right)}\)
Bai 1:a)Tim x biet\(\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+...+\frac{2}{x\times\left(x+1\right)}=\frac{2009}{2011}\)
b)\(\left(x-1\right)\times f\left(x\right)=\left(x+4\right)\times f\left(x\right)\)voi moi x
Bai 2;Tim x;y;z biet a)\(\frac{y+z+1}{x}=\frac{x+z+2}{y}=\frac{x+y-3}{z}\) b)\(\frac{2x+1}{5}=\frac{3y-z}{7}=\frac{2x+3y-1}{6x}\)
Tìm Xa) frac{1}{21} + frac{1}{28} + frac{1}{36} +........+frac{2}{x.left(x+1right)} frac{2}{9}Chú ý : trong vế có x chỉ có 1 p/s duy nhat có 1 p/s có tử là 2 là p/s cuốib) frac{1}{5.8} + frac{1}{8.11} + frac{1}{11.13} +.........+frac{1}{x.left(x+3right)} frac{101}{1540}c) left(frac{2}{11.13}+frac{2}{13.15}+...+frac{2}{19.21}right)x 462 - [2,04:(x+1,05)]:0.1219Mong các bạn giải chi tiết (3 điểm hỏi đáp) Cảm ơn
Đọc tiếp
Tìm X
a) \(\frac{1}{21}\) + \(\frac{1}{28}\) + \(\frac{1}{36}\) +........+\(\frac{2}{x.\left(x+1\right)}\) = \(\frac{2}{9}\)
Chú ý : trong vế có x chỉ có 1 p/s duy nhat có 1 p/s có tử là 2 là p/s cuối
b) \(\frac{1}{5.8}\) + \(\frac{1}{8.11}\) + \(\frac{1}{11.13}\) +.........+\(\frac{1}{x.\left(x+3\right)}\) = \(\frac{101}{1540}\)
c) \(\left(\frac{2}{11.13}+\frac{2}{13.15}+...+\frac{2}{19.21}\right)\)x 462 - [2,04:(x+1,05)]:0.12=19
Mong các bạn giải chi tiết (3 điểm hỏi đáp) Cảm ơn
tim x biet
a.\(\frac{x+1}{10}+\frac{x+1}{11}=\frac{x+1}{12}=\frac{x+1}{13}+\frac{x+1}{14}\)
b.\(\frac{x+4}{1990}+\frac{x+3}{1991}=\frac{x+2}{1992}+\frac{x+1}{1993}\)
a) \(\left(\frac{6^3-10,5^3}{6^2.3^3-15^2.5^2}.\left|x-2\right|\right):10=\left(1-\frac{1}{2}\right).\left(1-\frac{1}{3}\right).....\left(1-\frac{1}{9}\right).\left(1-\frac{1}{10}\right)\)
b) \(\frac{x-2018}{2}+\frac{x-2020}{4}=\frac{x-2040}{8}+\frac{x-2030}{14}\)
tim x biet
\(2\frac{1}{3}-\frac{1}{6}\left|-2x+\frac{1}{2}\right|\)\(=\frac{1}{2}\left|-x+\frac{1}{2}\right|-\frac{2}{3}\)
Tim x
\(\frac{x+2015}{5}+\frac{x+2016}{4}=\frac{x+2017}{3}+\frac{x+2018}{2}\)
2/ tim x
\(\frac{x+2015}{5}+\frac{x+2016}{6}=\frac{x+2017}{7} +\frac{x+2018}{8}\)
3/ tim x
\(\frac{1}{3}+\frac{1}{6}+\frac{99}{101}+\frac{1}{15}+... +\frac{1}{x\left(2x+1\right)}=\frac{1}{10}\)