Question:medium

If matrix
\[ A = \begin{bmatrix} 3 & -2 & 4 \\ 1 & 2 & -1 \\ 0 & 1 & 1 \end{bmatrix}, \quad \text{and} \quad A^{-1} = \frac{1}{k} \, \text{adj}(A), \]
then \(k\) is:

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Always relate inverse with determinant using:
\[ A^{-1} = \frac{1}{\det A} \, \text{adj}(A) \]
Updated On: Mar 23, 2026
  • 7
  • \(-7\)
  • 15
  • -11
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The Correct Option is A

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