3.
定义运算\(\left| \begin{matrix} & a, \\ & c, \\ \end{matrix} \right.\left. \begin{matrix} & b \\ & d \\ \end{matrix} \right|=ad-bc\),则符合条件\(\left| \begin{matrix} & z, \\ & -i, \\ \end{matrix} \right.\left. \begin{matrix} & 1+i \\ & 2i \\ \end{matrix} \right|=0\)复数\(\overline{z}\)对应的点在