Matrices & Determinants
Inverse of a matrix
Grade None
Question:
<p>If determinant is non-zero, inverse exists because:</p>
rank is zero
matrix is singular
matrix is non-singular
matrix is zero
Step-by-Step Solution
Key Concept: Inverse exists only for non-singular matrices.
1. $\Delta$ $\neq$ 0
2. Matrix non-singular
3. Inverse exists
Correct Answer: 3