Matrices & Determinants
Properties of determinants
Grade 12

Question:

<p>If determinant of matrix \( A \) is 5, then determinant of \(2A\) is:</p>
10
20
40
8

Step-by-Step Solution

Key Concept: Scaling matrix by k multiplies determinant by kⁿ (n=order).
1. det(\(2A\)) = \(2^3\) \times det(A) 2. = 8 \times 5 = 40
Correct Answer: 3

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