1.

If \(A = \left( {\begin{array}{*{20}{c}} 1&2\\ 2&3 \end{array}} \right)\) and \(B = \left( {\begin{array}{*{20}{c}} 1&0\\ 1&0 \end{array}} \right)\) then what is determinant of AB?

A. 0
B. 1
C. 10
D. 20
Answer» B. 1


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