a)
dths qua K(-2;2) \(\Leftrightarrow\left\{{}\begin{matrix}x=-2\\y=2\end{matrix}\right.\) \(\Leftrightarrow2=\left(3m-2\right)\left|-2\right|\Leftrightarrow3m-2=1;m=1\)
b)
\(\left(1\right);y=\left|x\right|\)
Điểm A \(\Leftrightarrow\left\{{}\begin{matrix}x=a\\y=b\end{matrix}\right.\) \(\Leftrightarrow b=\left|a\right|\)
2018 a+b =2019 <=.> \(2018a+\left|a\right|=2019\)
\(\left[{}\begin{matrix}a< 0\Leftrightarrow2018a-a=2019;a=\dfrac{2019}{2017}\left(l\right)\\a\ge0\Leftrightarrow2018a+a=2019;a=\dfrac{2019}{2019}=1\end{matrix}\right.\)
\(A\left(1;1\right)\)