K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

27 tháng 3 2016

x+1/2013+1+x+2/2012+1=x+3/2011+1+x+4/2010+1

x+1+2013/2013+x+2+2012/2012=x+3+2011/2011+x+4+2010/2010

x+2014/2013+x+2014/2012-x+2014/2011-x+2014/2010=0

(x+2014)(1/2013+1/2012-1/2011-1/2010)=0

x+2014=0

x=-2014

27 tháng 3 2016

\(\frac{x+1}{2013}+1+\frac{x+2}{2012}+1=\frac{x+3}{2011}+1+\frac{x+4}{2010}+1\)

\(\Rightarrow\frac{x+2014}{2013}+\frac{x+2014}{2012}=\frac{x+2014}{2011}+\frac{x+2014}{2010}\)

\(\Rightarrow\left(x+2014\right)\left(\frac{1}{2013}+\frac{1}{2012}-\frac{1}{2011}-\frac{1}{2010}\right)=0\)

\(\Rightarrow\left(x+2014\right)=0\)

\(\Rightarrow x=-2014\)

23 tháng 8 2018

\(\dfrac{x-1}{2013}+\dfrac{x-2}{2012}+\dfrac{x-3}{2011}+...+\dfrac{x-2012}{2}=2012\)

\(\Rightarrow\dfrac{x-1}{2013}+\dfrac{x-2}{2012}+\dfrac{x-3}{2011}+...+\dfrac{x-2012}{2}-2012=0\)

\(\Rightarrow\dfrac{x-1}{2013}-1+\dfrac{x-2}{2012}-1+\dfrac{x-3}{2011}-1+...+\dfrac{x-2012}{2}-1=0\)

\(\Rightarrow\dfrac{x-2014}{2013}+\dfrac{x-2014}{2012}+\dfrac{x-2014}{2011}+...+\dfrac{x-2014}{2}=0\)

\(\Rightarrow\left(x-2014\right)\left(\dfrac{1}{2013}+\dfrac{1}{2012}+\dfrac{1}{2011}+...+\dfrac{1}{2}\right)=0\)

\(\dfrac{1}{2013}+\dfrac{1}{2012}+\dfrac{1}{2011}+...+\dfrac{1}{2}\ne0\)

\(\Rightarrow x-2014=0\)

\(\Rightarrow x=2014\)