Matrices & Determinants
Properties of determinants
Grade 12
Question:
<p>If det(\(A\)) = -4, then det(\(A^T\)) is:</p>
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