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Multiplicative inverse of a matrix - class-XII

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Multiple Choice

Find the inverse f the following matrices by using transformation method.

  1. $\begin{bmatrix}
    1 &2 \\
    2 &-1
    \end{bmatrix}$
  2. $\begin{bmatrix}
    2 &-3 \\
    -1 &2
    \end{bmatrix}$
  3. $\begin{bmatrix}
    0& 1 &2 \\
    1& 2 &3 \\
    3& 1 &1
    \end{bmatrix}$
  4. $\begin{bmatrix}
    2& 0 &-1 \\
    5& 1 &0 \\
    0& 1 &3
    \end{bmatrix}$
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