Có: \(\left(2x-1\right)^{2016}\ge0;\left(y-\frac{2}{5}\right)^{2016}\ge0;\left|x+y+z\right|\ge0\forall x;y;z\)
Mà theo đề bài: \(\left(2x-1\right)^{2016}+\left(y-\frac{2}{5}\right)^{2016}+\left|x+y+z\right|=0\)
\(\Rightarrow\begin{cases}\left(2x-1\right)^{2016}=0\\\left(y-\frac{2}{5}\right)^{2016}=0\\\left|x+y+z\right|=0\end{cases}\)\(\Rightarrow\begin{cases}2x-1=0\\y-\frac{2}{5}=0\\x+y+z=0\end{cases}\)\(\Rightarrow\begin{cases}2x=1\\y=\frac{2}{5}\\x+y+z=0\end{cases}\)
\(\Rightarrow\begin{cases}x=\frac{1}{2}\\y=\frac{2}{5}\\z=\frac{-9}{10}\end{cases}\)
Vậy \(x=\frac{1}{2};y=\frac{2}{5};z=\frac{-9}{10}\)
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