Question

/x+1/2015/+/x+2/2015/+...+/x+2016/2015/=2017x

các bạn làm ơn giúp mình với ! mình gấp lắm

Answer 1

Ta có: \(\left|x+\frac{1}{2015}\right|\ge0\)

\(\left|x+\frac{2}{2015}\right|\ge0\)

...

\(\left|x+\frac{2016}{2015}\right|\ge0\)

\(\Rightarrow\left|x+\frac{1}{2015}\right|+\left|x+\frac{2}{2015}\right|+...+\left|x+\frac{2016}{2015}\right|\ge0\)

\(\Rightarrow2017x\ge0\)

\(\Rightarrow x\ge0\)

\(\Rightarrow\left|x+\frac{1}{2015}\right|+\left|x+\frac{2}{2015}\right|+...+\left|x+\frac{2016}{2015}\right|=x+\frac{1}{2015}+x+\frac{2}{2015}+...+x+\frac{2016}{2015}=2017x\)

\(\Rightarrow2016x+\left(\frac{1}{2015}+\frac{2}{2015}+...+\frac{2016}{2015}\right)=2017x\)

\(\Rightarrow x=\frac{1+2+...+2016}{2015}\)

Vậy \(x=\frac{1+2+...+2016}{2015}\)

Bạn cần số cụ thể thì tính ra nhé!