Ôn tập toán 8
Các câu hỏi tương tự
giải pt \(\dfrac{2-x}{2007}-1=\dfrac{1-x}{2008}-\dfrac{x}{2009}\)
Giải phương trình sau :
a) \(\frac{x^2-2x+1}{x^2-2x+2}+\frac{x^2-2x+2}{x^2-2x+3}=\frac{7}{6}\)
b) \(\frac{x+2}{2008}+\frac{x+3}{2007}+\frac{x+4}{2006}+\frac{x+2028}{6}=0\)
Giải pt
\(\left(\dfrac{-1}{x}+3x\right)\left(1\dfrac{2}{3}x\right).1999=0\)
Giải pt:
a) \(\dfrac{x+14}{86}\)+ \(\dfrac{x+15}{85}\)+\(\dfrac{x+16}{84}\)+\(\dfrac{x+17}{83}\)+\(\dfrac{x+16}{4}\)= 0
b) \(\dfrac{x-90}{10}\)+ \(\dfrac{x-76}{12}\)+ \(\dfrac{x-50}{14}\)+ \(\dfrac{x-15}{17}\)=15
Giải các phương trình sau:
a) \(\dfrac{x-2015}{1}\)\(+\)\(\dfrac{x-2014}{2}+\dfrac{x-2013}{3}+...+\dfrac{x-1}{2015}+\dfrac{x}{2016}\)
b) \(\dfrac{1}{x^2+3x+2}+\dfrac{1}{x^2+5x+6}+\dfrac{1}{x^2+7x+12}+\dfrac{1}{x^2+9x+20}=\dfrac{1}{8}\)
a)
\(\dfrac{x-1}{x+2}-\dfrac{x}{x-2}=\dfrac{5x-2}{4-x^2}\)
b)
\(\dfrac{x-3}{x+2}+\dfrac{x-2}{x-4}=3\dfrac{1}{5}\)
\(\left(\dfrac{-1}{2}+3x\right)\left(1-\dfrac{2}{3}x\right)1999=0\)
giải pt
Tìm x : \(\dfrac{1}{x^2-x}+\dfrac{1}{x^2-3x+2}+\dfrac{1}{x^2-5x+6}+\dfrac{1}{x^2-7x+12}=2-\dfrac{1}{4-x}\)
Giải phương trình \(8\left(x+\dfrac{1}{x}\right)^2+4\left(x^2+\dfrac{1}{x^2}\right)^2-4\left(x^2+\dfrac{1}{x^2}\right)\left(x+\dfrac{1}{x}\right)^2=\left(x+4\right)^2\)