જો $A = \begin{bmatrix} 1 & 2 & 1 \\ 3 & 1 & 3 \end{bmatrix}$ અને $B = \begin{bmatrix} 2 & 3 \\ 1 & 2 \\ 1 & 2 \end{bmatrix}$ હોય,તો $(AB)^{-1} =$

  • A
    $\begin{bmatrix} \frac{-17}{5} & \frac{9}{5} \\ 2 & -1 \end{bmatrix}$
  • B
    $\begin{bmatrix} \frac{17}{5} & \frac{9}{5} \\ 2 & 1 \end{bmatrix}$
  • C
    $\begin{bmatrix} \frac{-17}{5} & 2 \\ \frac{-9}{5} & -1 \end{bmatrix}$
  • D
    $\begin{bmatrix} \frac{-17}{5} & 2 \\ \frac{9}{5} & 1 \end{bmatrix}$

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જો $A$ એ અસામાન્ય (non-singular) શ્રેણિક હોય,તો $\operatorname{Adj}\left(A^{-1}\right)=$

શ્રેણિક $\begin{bmatrix} 5 & -2 \\ 3 & 1 \end{bmatrix}$ નો વ્યસ્ત શ્રેણિક શોધો.

જો $A = \left[\begin{array}{cc}1+2 i & i \\ -i & 1-2 i\end{array}\right]$ જ્યાં $i=\sqrt{-1}$ હોય,તો $A (\operatorname{adj} A )=\ldots$. ($I$ માં)

જો $A = \begin{bmatrix} 2 & 3 \\ 1 & 2 \end{bmatrix}$ અને $B = \begin{bmatrix} 1 & 0 \\ 3 & 1 \end{bmatrix}$ હોય,તો $B^{-1} A^{-1} = $

જો $A = \begin{bmatrix} 1 & 2 & 1 \\ 2 & 1 & 0 \end{bmatrix}$ અને $B = \begin{bmatrix} 1 & 2 \\ 2 & 1 \\ 0 & 1 \end{bmatrix}$ હોય,તો $(AB)^{-1}$ શું થાય?

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