Giả sử điểm cố định là \(\left(x_0;y_0\right)\)
\(\Rightarrow y_0=-2mx_0+m+1\) \(\forall m\)
\(\Rightarrow m\left(2x_0-1\right)+\left(y_0-1\right)=0\)
\(\Rightarrow\left\{{}\begin{matrix}2x_0-1=0\\y_0-1=0\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}x_0=\frac{1}{2}\\y_0=1\end{matrix}\right.\)