Ta có

(x -1)^2016 >0; (2y-1)^2016>0;  /x+2y-z/^2017>0

Mà tổng ba số trên bằng 0

=>(x-1)^2016=0 ; (2y-1)^2016=0; /x+2y-z/=0

=>x=1; y=1/2; z= 2

\(\left\{{}\begin{matrix}\left(x-1\right)^{2016}\ge0\\\left(2y-1\right)^{2016}\ge0\\\left|x+2y-z\right|^{2017}\ge0\end{matrix}\right.\Rightarrow\left(x-1\right)^{2016}+\left(2y-1\right)^{2016}+\left|x+2y-z\right|^{2017}\ge0\)

Mà \(\left(x-1\right)^{2017}+\left(2y-1\right)^{2016}+\left|x+2y-z\right|^{2017}=0\)

\(\Rightarrow\left\{{}\begin{matrix}\left(x-1\right)^{2016}=0\\\left(2y-1\right)^{2016}=0\\\left|x+2y-z\right|^{2017}=0\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=1\\y=\dfrac{1}{2}\\z=2\end{matrix}\right.\)

\(\left(x-1\right)^{2016}+\left(2y-1\right)^{2016}+\left|x+2y-z\right|^{2017}=0\)

\(\left\{{}\begin{matrix}\left(x-1\right)^{2016}\ge0\\\left(2y-1\right)^{2016}\ge0\\\left|x+2y-z\right|^{2017}\ge0\end{matrix}\right.\)

\(\Rightarrow\left(x-1\right)^{2016}+\left(2y-1\right)^{2016}+\left|x+2y-z\right|^{2017}\ge0\)

Dấu "=" xảy ra khi:

\(\left\{{}\begin{matrix}\left(x-1\right)^{2016}=0\\\left(2y-1\right)^{2016}=0\\\left|x+2y-z\right|=0\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}x=1\\y=\dfrac{1}{2}\\z=\dfrac{3}{2}\end{matrix}\right.\)

Vậy...

Ta có :

\(\left(x-1\right)^{2006}\ge0\)

\(\left(2y-1\right)^{2016}\ge0\)

\(\left(x+2y-z\right)^{2017}\ge0\)

Mà \(\left(x-1\right)^{2016}+\left(2y-1\right)^{2016}\)\(+|x+2y-z|^{2017}\)

\(\Rightarrow\hept{\begin{cases}\left(x-1\right)^{2006}=0\\\left(2x-1\right)^{2016}=0\\|x+2y-z|^{2017}=0\end{cases}\Leftrightarrow\hept{\begin{cases}x-1=0\\2y-1=0\\x+2y-z=0\end{cases}}}\)

\(\Rightarrow\hept{\begin{cases}x=1\\2y=1\\1-1-z=0\end{cases}\Leftrightarrow\hept{\begin{cases}x=1\\y=\frac{1}{2}\\z=2\end{cases}}}\)

Vậy ...

Ta có : 

\(\left(x-1\right)^{2006}\ge0\)

\(\left(2y-1\right)^{2016}\ge0\)

\(\left|x+2y-z\right|^{2017}\ge0\)

Mà \(\left(x-1\right)^{2006}+\left(2x-1\right)^{2016}+\left|x+2y-z\right|^{2017}=0\)

Suy ra : \(\hept{\begin{cases}\left(x-1\right)^{2006}=0\\\left(2x-1\right)^{2016}=0\\\left|x+2y-z\right|^{2017}=0\end{cases}\Leftrightarrow\hept{\begin{cases}x-1=0\\2y-1=0\\x+2y-z=0\end{cases}}}\)

\(\Leftrightarrow\)\(\hept{\begin{cases}x=1\\2y=1\\1+1-z=0\end{cases}\Leftrightarrow\hept{\begin{cases}x=1\\y=\frac{1}{2}\\z=2\end{cases}}}\)

Vậy \(x=1\)\(;\)\(y=\frac{1}{2}\) và \(z=2\)

Chúc bạn học tốt ~ 

Cho mk hỏi trước dấu trị tuyện đối là dấu j z ?

ko có dấu j cả. Thôi ko cần giải đâu thầy mk giải rùi

b: 5x^2+5y^2+8xy-2x+2y+2=0

=>4x^2+8xy+4y^2+x^2-2x+1+y^2+2y+1=0

=>(x-1)^2+(y+1)^2+(2x+2y)^2=0

=>x=1 và y=-1

M=(1-1)^2015+(1-2)^2016+(-1+1)^2017=1

1) Áp dụng tích chất dãy tỉ số bằng nhau ta có:

\(\frac{x+y}{2015}=\frac{xy}{2016}=\frac{x-y}{2017}=\frac{x+y-x+y}{2015-2017}=\frac{2y}{-2}\)

\(=-y\)

\(\Rightarrow xy=-2016y;x+y=-2015y;\)

\(x-y=-2017y\)

\(\Rightarrow-2016y-xy=0\)

\(\Rightarrow y\left(-2016-x\right)=0\)

\(\Rightarrow\orbr{\orbr{\begin{cases}y=0\\-2016-x=0\end{cases}\Rightarrow}}\orbr{\begin{cases}y=0\\x=-2016\end{cases}}\)

\(+) \)\(y=0\Rightarrow0+x=-2015.0=0\Rightarrow x=0\)

\(+) \)\(x=-2016\Rightarrow-2016-y=-2017y\Rightarrow-2016\)

Vậy +) x=y=0

       +) x=-2016;y=1

2) Có: \(\frac{2x+2}{3}=\frac{x+1}{1,5};\frac{4z+2}{5}=\frac{z+0,5}{1,25};\frac{3y-1}{4}=\frac{y-\frac{1}{3}}{\frac{4}{3}}\)

Áp dụng tính chất dãy tỉ số bằng nhau ta có:

\(\frac{x+1}{1,5}=\frac{y-\frac{1}{3}}{\frac{4}{3}}=\frac{z+0,5}{1,25}=\frac{x+y+z+\left(1-\frac{1}{3}+0,5\right)}{1,5+\frac{4}{3}+1,25}=\frac{7+\frac{7}{6}}{\frac{49}{12}}=2\)

Suy ra: \(x+1=2.1,5=3\Rightarrow x=2\)

             \(y-\frac{1}{3}=2.\frac{4}{3}=\frac{8}{3}\Rightarrow y=3\)

            \(z+0,5=2.1,25=2,5\Rightarrow z=2\)

Vậy x=2;y=3;z=2.

Câu 1 :

Áp dụng t/c dãy TSBN ta có : \(\frac{x+y}{2015}=\frac{xy}{2016}=\frac{x-y}{2017}=\frac{x+y+x-y}{2015+2017}=\frac{x}{2016}\)

\(\Rightarrow\frac{xy}{2016}=\frac{x}{2016}\)=> xy=x => xy-x=0 => x(y-1)=0 => x=0 hoặc y=1

+) Nếu x=0 => \(\frac{0+y}{2015}=\frac{0.y}{2016}\Rightarrow\frac{y}{2015}=0\Rightarrow y=0\)

+) Nếu y=1 => \(\frac{x+1}{2015}=\frac{x.1}{2016}\)=> 2016(x+1)=2015x => 2016x+2016 = 2015x => x=-2016

             Vậy ...

Câu 2 :

Áp dụng t/c dãy TSBN ta có : \(\frac{2x+2}{3}=\frac{3y-1}{4}=\frac{4z+2}{5}=\frac{6.\left(2x+2\right)+4.\left(3y-1\right)+3.\left(4z+2\right)}{3.6+4.4+5.3}\)

                                             \(=\frac{12\left(x+y+z\right)+14}{49}=\frac{12.7+14}{49}=2\)

Từ  \(\frac{2x+2}{3}=2\Rightarrow2x+2\Rightarrow6\Rightarrow2x=4\Rightarrow x=2\)

Tương tự tìm đc y=3 và z=2

            Vậy ...