જો $A = \begin{bmatrix} 4 & 0 & 0 \\ 0 & 3 & 0 \\ 0 & 0 & 2 \end{bmatrix}$ અને $B = \begin{bmatrix} 1 & 0 & 0 \\ 0 & 2 & 0 \\ 0 & 0 & 3 \end{bmatrix}$ હોય,તો $(A+B)^{-1} = $ . . . . . . .

  • A
    $\frac{1}{25} I_3$
  • B
    $\frac{1}{5} I_3$
  • C
    $-\frac{1}{5} I_3$
  • D
    $-\frac{1}{25} I_3$

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ધારો કે $A = \begin{bmatrix} 2k - 1 & 1 & 1 \\ 0 & 2k - 1 & 1 \\ 0 & 0 & 2k - 1 \end{bmatrix}$ અને $B = \begin{bmatrix} 0 & 2k - 1 & 1 \\ 1 - 2k & 0 & k \\ -1 & -k & 0 \end{bmatrix}$ જ્યાં $k$ એ વાસ્તવિક સંખ્યા છે. જો $\det(\text{adj } A) + \det(\text{adj } B) = 11^6$ હોય, તો $k - 5$ ની કિંમત કેટલી થાય...

જો $A = \begin{bmatrix} \cos \alpha & \sin \alpha \\ -\sin \alpha & \cos \alpha \end{bmatrix}$ અને $A \cdot \text{adj}(A) = \begin{bmatrix} k & 0 \\ 0 & k \end{bmatrix}$ હોય,તો $k$ ની કિંમત શોધો.

જો $A = \begin{bmatrix} a & 1 & 2 \\ 1 & 2 & b \\ c & 1 & 3 \end{bmatrix}$ અને $\operatorname{Adj} A = \begin{bmatrix} 7 & -1 & -5 \\ -3 & 9 & 5 \\ 1 & -3 & 5 \end{bmatrix}$ હોય,તો $a^2 + b^2 + c^2 = $

જો $A = \begin{bmatrix} 2 & 2 \\ 9 & 4 \end{bmatrix}$ અને $I = \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix}$ હોય,તો $10 A^{-1}$ ની કિંમત શોધો.

જો $A = \begin{bmatrix} 3 & -3 & 4 \\ 2 & -3 & 4 \\ 0 & -1 & 1 \end{bmatrix}_{3 \times 3}$ હોય,તો $A^{-1} = $

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