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30 tháng 11 2017

\(\dfrac{x+1}{2015}+\dfrac{x+2}{2014}+\dfrac{x+3}{2013}+\dfrac{x+4}{2012}+\dfrac{x+2024}{2}=0\)

\(\Leftrightarrow(\dfrac{x+1}{2015}+1)+(\dfrac{x+2}{2014}+1)+(\dfrac{x+3}{2013}+1)+(\dfrac{x+4}{2012}+1)+\dfrac{x+2024}{2}-4=0\)\(\Leftrightarrow\dfrac{x+2016}{2015}+\dfrac{x+2016}{2014}+\dfrac{x+2016}{2013}+\dfrac{x+2016}{2012}+\dfrac{x+2016}{2}=0\)\(\Leftrightarrow\left(x+2016\right)\left(\dfrac{1}{2015}+\dfrac{1}{2014}+\dfrac{1}{2013}+\dfrac{1}{2012}+\dfrac{1}{2}\right)=0\)

Hiển nhiên: \(\dfrac{1}{2015}+\dfrac{1}{2014}+\dfrac{1}{2013}+\dfrac{1}{2012}+\dfrac{1}{2}>0\)

\(\Leftrightarrow x+2016=0\Leftrightarrow x=-2016\)

(x-1)/2015 + x/2014 + 1/503 - (x-3)/2013 - x/2012 - 1/1007 =0

(x-2016)/2015  + (x-2016)/2014 - (x-2016)/2012 - (x-2016)/2013 = 0

(x-2016) ( 1/2015 + 1/2016 - 1/2013 - 1/2012) = 0

Mà 1/2015 + 1/2016 - 1/2013 - 1/2012 khác 0

Suy ra x -2016=0

x=2016

Chỗ nào thắc mắc nhớ hỏi mik nhe!

27 tháng 2 2020

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4 tháng 10 2019

\(b)4x\left(x-2014\right)-\left(x-2014\right)=0\)

\(\left(4x-1\right)\left(x-2014\right)=0\)

\(\Leftrightarrow TH1:4x-1=0\)

\(4x=1\)

\(x=\frac{1}{4}\)

\(TH2:x-2014=0\)

\(x=2014\)

Vậy \(x\in\left\{\frac{1}{4};2014\right\}\)

4 tháng 10 2019

\(b,4x\left(x-2014\right)-x+2014=0\)

\(\Leftrightarrow\left(x-2014\right)\left(4x-1\right)=0\)

\(\Leftrightarrow\orbr{\begin{cases}x=2014\\x=\frac{1}{4}\end{cases}}\)

\(c,\left(x+1\right)^2=x+1\)

\(\Leftrightarrow\left(x+1\right)x=0\)

\(\Leftrightarrow\orbr{\begin{cases}x=0\\x=-1\end{cases}}\)

6 tháng 1 2022

\(\dfrac{x+1}{2020}+\dfrac{x-1}{2018}=\dfrac{x+5}{2024}+\dfrac{x-5}{2014}\)

\(\Leftrightarrow\left(\dfrac{x+1}{2020}-1\right)+\left(\dfrac{x-1}{2018}-1\right)-\left(\dfrac{x+5}{2024}-1\right)-\left(\dfrac{x-5}{2014}-1\right)=0\)

\(\Leftrightarrow\dfrac{x-2019}{2020}+\dfrac{x-2019}{2018}-\dfrac{x-2019}{2024}-\dfrac{x-2019}{2014}=0\)

\(\Leftrightarrow\left(x-2019\right)\left(\dfrac{1}{2020}+\dfrac{1}{2018}-\dfrac{1}{2024}-\dfrac{1}{2014}\right)=0\)

\(\Leftrightarrow x-2019=0\\ \Leftrightarrow x=2019\)

11 tháng 12 2019

Ta có : \(\frac{x+2}{2021}+\frac{x+5}{2024}+\frac{x+3}{2022}=3\)

=> \(\left(\frac{x+2}{2021}-1\right)+\left(\frac{x+5}{2024}-1\right)+\left(\frac{x+3}{2022}-1\right)=3-1-1-1\)

\(\Rightarrow\frac{x-2019}{2021}+\frac{x-2019}{2024}+\frac{x-2019}{2022}=0\)

\(\Rightarrow\left(x-2019\right)\left(\frac{1}{2021}+\frac{1}{2024}+\frac{1}{2022}\right)=0\)

Vì \(\frac{1}{2021}+\frac{1}{2024}+\frac{1}{2022}\ne0\)

=> x - 2019 = 0

=> x = 2019