x-1/2014+x-2/2013=x-3/2012+x-4/2011
Tìm x biết: (1/2+1/3+1/4+...+1/2014).x =2013/1+2012/2+2011/3+...+2/2012+1/2013
Tìm x, biết:
\(\dfrac{x-3}{2015}+\dfrac{x-4}{2014}+\dfrac{x-5}{2013}+\dfrac{x-6}{2012}=4\)
Tìm x biết: \(\dfrac{x-1}{2014}+\dfrac{x-2}{2013}-\dfrac{x-3}{2012}=\dfrac{x-4}{2011}\)
Tìm x: \(\frac{x+4}{2013}+\frac{x+3}{2014}=\frac{x+2}{2015}+\frac{x+1}{2016}\)
Tìm x , biết ;
\(\dfrac{x+1}{2016}+\dfrac{x+2}{2015}=\dfrac{x+3}{2014}+\dfrac{x+4}{2013}\)
Tìm x biết:
a) \(2^x+2^{x+1}+2^{x+2}+2^{x+3}=120\)
b) \(\dfrac{x+4}{2011}+\dfrac{x+3}{2012}=\dfrac{x+2}{2013}+\dfrac{x+1}{2014}\)
cho đa thức f(x)=\(x\left(\frac{x^{2013}}{3}-\frac{x^{2014}}{5}+\frac{x^{2015}}{7}+\frac{x^2}{2}\right)-\)\(\left(\frac{x^{2014}}{3}-\frac{x^{2015}}{5}+\frac{x^{2016}}{7}+\frac{x^2}{2}\right)\).chứng minh đa thức f(x) nhận giá trị nguyên với mọi giá trị x nguyên
Tìm x,y biết rằng : \(|x-2013|+|x-2014|+|y-2015|+|x-2016|=3\)
