Matrices & Determinants
Properties of determinants
Grade 12

Question:

<p>If det(\(A\)) = -4, then det(\(A^T\)) is:</p>
-4
4
0
1

Step-by-Step Solution

Key Concept: Determinant remains unchanged under transpose.
Step 1: Recall the property of determinants for a transpose matrix. A fundamental property of determinants states that the determinant of a matrix is equal to the determinant of its transpose. This can be expressed as: $$ \det(A^T) = \det(A) $$ Step 2: Substitute the given value of $\det(A)$. We are given that $\det(A) = -4$. Using the property from Step 1, we can substitute this value: $$ \det(A^T) = -4 $$ Step 3: State the final answer and match the option. The value of $\det(A^T)$ is $-4$. The final answer is $\boxed{-4}$. This corresponds to Option 1.
Correct Answer: 1

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