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1. |
If a matrix is given by A = \(\left[ {\begin{array}{*{20}{c}} 1&2&3\\ 0&4&5\\ 0&0&1 \end{array}} \right]\) , then the determinant of A-1 is: |
A. | 3 |
B. | \(\frac{1}{3}\) |
C. | \(\frac{1}{4}\) |
D. | 4 |
Answer» D. 4 | |