Giá trị x thỏa mãn
|x/2015 + x/2016 | = | x/2016 + x/2017|
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\(\frac{x}{2015}+\frac{x}{2016}=\frac{x}{2016}+\frac{x}{2017}\)
\(\Rightarrow\frac{x}{2015}+\frac{x}{2016}-\frac{x}{2016}-\frac{x}{2017}=0\)
\(\Rightarrow\frac{x}{2015}-\frac{x}{2017}=0\)
\(\Rightarrow x.\left(\frac{1}{2015}-\frac{1}{2017}\right)=0\)
Mà ta thấy \(\frac{1}{2015}-\frac{1}{2017}\ne0\Rightarrow x=0\)
Vậy \(x=0\)
\(\frac{x}{2015}+\frac{x}{2016}=\frac{x}{2016}+\frac{x}{2017}\)
\(\Leftrightarrow\frac{x}{2015}+\frac{x}{2016}-\frac{x}{2016}-\frac{x}{2017}=0\)
\(\Leftrightarrow x\left(\frac{1}{2015}+\frac{1}{2016}-\frac{1}{2016}-\frac{1}{2017}\right)=0\)
\(\Leftrightarrow x=0\).Do \(\frac{1}{2015}+\frac{1}{2016}-\frac{1}{2016}-\frac{1}{2017}\ne0\)
Vậy giá trị của x là x=0
\(\frac{x}{2015}+\frac{x}{2016}+\frac{x}{2017}-\frac{x}{2018}\)\(=0\)=> \(x\left(\frac{1}{2015}+\frac{1}{2016}+\frac{1}{2017}-\frac{1}{2018}\right)=0\)
Dễ thấy biếu thức trong ngoặc khác 0 nên \(x=0\).
|x+2015|+2016=2017
|x+2015|=2017-2016
|x+2015|=1
|x+2015|=+1
=>x+2015=1=>x=-2014
=>x+2015=-1=>x=-2016
Vay .....................
k mik nha ban
ta co:/x+2015/=2017-2016=1
{x+2015=1;x=-2014
x+2015=-1;x=-2016
\(\frac{x}{2015}+\frac{x}{2016}=\frac{x}{2016}+\frac{x}{2017}\)
=>\(\frac{x}{2015}=\frac{x}{2017}\)
Vì 2015 khác 2017. Nên x=0
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Ta có: 5x2+5y2+8xy-2x+2y+2=0
=> 4x2+8xy+4y2+x2-2x+1+y2+2y+1=0
=> (2x+2y)2+(x-1)2+(y+1)2=0
=> {2x+2y=0 => x=-y
{x-1 = 0 => x=1
{y+1 =0 => y=-1
=> x=1, y=-1
Thay vào biểu thức M, ta có:
M=(1+-1)2015+(1-2)2016+(-1+1)2017=0+1+0=1 (đpcm)
\(\left|\frac{x}{2015}+\frac{x}{2016}\right|=\left|\frac{x}{2016}+\frac{x}{2017}\right|\)
<=>\(\left|x\right|.\left|\frac{1}{2015}+\frac{1}{2016}\right|=\left|x\right|.\left|\frac{1}{2016}+\frac{1}{2017}\right|\)
<=>\(\left|x\right|.\left(\frac{1}{2015}+\frac{1}{2016}\right)=\left|x\right|.\left(\frac{1}{2016}+\frac{1}{2017}\right)\)
<=>\(\left|x\right|.\left(\frac{1}{2015}+\frac{1}{2016}\right)-\left|x\right|.\left(\frac{1}{2016}+\frac{1}{2017}\right)=0\)
<=>\(\left|x\right|.\left(\frac{1}{2015}+\frac{1}{2016}-\frac{1}{2016}-\frac{1}{2017}\right)=0\)
<=>\(\left|x\right|.\left(\frac{1}{2015}-\frac{1}{2017}\right)=0\)
Vì \(\frac{1}{2015}-\frac{1}{2017}\ne0\Rightarrow\left|x\right|=0\Rightarrow x=0\)
Vậy x=0
\(\left|\frac{x}{2015}+\frac{x}{2016}\right|=\left|\frac{x}{2016}+\frac{x}{2017}\right|\)
\(\Rightarrow\left|x.\left(\frac{1}{2015}+\frac{1}{2016}\right)\right|=\left|x.\left(\frac{1}{2016}+\frac{1}{2017}\right)\right|\)
\(\Rightarrow\left|x\right|.\left|\frac{1}{2015}+\frac{1}{2016}\right|=\left|x\right|.\left|\frac{1}{2016}+\frac{1}{2017}\right|\)
\(\Rightarrow\left|x\right|.\left(\frac{1}{2015}+\frac{1}{2016}\right)=\left|x\right|.\left(\frac{1}{2016}+\frac{1}{2017}\right)\)
Mà \(\frac{1}{2015}+\frac{1}{2016}>\frac{1}{2016}+\frac{1}{2017}\)
=> |x| = 0
=> x = 0
Vậy x = 0