Question:

If \(|A|=3\)  and \(A^{-1}=\begin{bmatrix}        3 &-1 \\[0.3em]        \frac{-5}{3} & \frac{2}{3}    \\[0.3em]     \end{bmatrix}\) then adj \(A\) is 

Updated On: May 21, 2024
  • \(\begin{bmatrix}    9 & 3  \\[0.3em]    5  &2  \end{bmatrix}\)
  • \(\begin{bmatrix}    -9 & 3  \\[0.3em]    -5  &2  \end{bmatrix}\)
  • \(\begin{bmatrix}    9 & -3  \\[0.3em]    -5  &2  \end{bmatrix}\)
  • \(\begin{bmatrix}    -9 & 3  \\[0.3em]    5  &-2  \end{bmatrix}\)
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The Correct Option is C

Solution and Explanation

The correct option is (C): \(\begin{bmatrix}    9 & -3  \\[0.3em]    -5  &2  \end{bmatrix}\)
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