\left[ \begin{array} { r r } { 1 } & { - 1 } \\ { 2 } & { 3 } \end{arr – InterviewSolution

1.

\left[ \begin{array} { r r } { 1 } & { - 1 } \\ { 2 } & { 3 } \end{array} \right]

Answer»

|1 -1||2 3|=3-(-2)=3+2=5

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