\left| \begin{array} { r r r } { 6 i } & { - 3 i } & { 1 } \\ { 4 } & – InterviewSolution

1.	\left\| \begin{array} { r r r } { 6 i } & { - 3 i } & { 1 } \\ { 4 } & { 3 i } & { - 1 } \\ { 20 } & { 3 } & { i } \end{array} \right\| = x + i y ,
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