Question (25 points): If $A = \begin{bmatrix} 1 & 4 & 7 \\ 0 & 5 & 5 \\ 0 & 1 & -1 \end{bmatrix}$, then $det(A) = -3$. Select one: True False Give your reasons
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Step 1: The determinant of a 2x2 matrix A = [a b; c d] is given by det A = ad - bc. Show more…
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