AP EAMCET · Maths · Matrices
If \(A=\left[\begin{array}{ccc}1 & 0 & -2 \\ -2 & -1 & 2 \\ 3 & 4 & 1\end{array}\right]\), then \(A^{-1}=\)
- A \(A^2-2 A-4\)
- B \(A^2-A-3\)
- C \(\frac{1}{2}\left[A^2+A+2 I\right]\)
- D \(A^2+A-2 l\)
Answer & Solution
Correct Answer
(B) \(A^2-A-3\)
Step-by-step Solution
Detailed explanation
Characteristic equation of any square matrix \(A\) is given by…
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