જો $a, b, c$ અને $d$ વાસ્તવિક સંખ્યાઓ એવી હોય કે જેથી $a^2+b^2+c^2+d^2=1$ અને $A=\left[\begin{array}{cc}a+ib & c+id \\ -c+id & a-ib\end{array}\right]$ હોય,તો $A^{-1}$ બરાબર શું થાય?

  • A
    $\left[\begin{array}{cc}a+ib & -c-id \\ c-id & a-ib\end{array}\right]$
  • B
    $\left[\begin{array}{cc}a-ib & c+id \\ -c+id & a+ib\end{array}\right]$
  • C
    $\left[\begin{array}{cc}a-ib & -c-id \\ c-id & a+ib\end{array}\right]$
  • D
    $\left[\begin{array}{cc}a+ib & c+id \\ c-id & a-ib\end{array}\right]$

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જો $A = \begin{bmatrix} 5a & -b \\ 3 & 2 \end{bmatrix}$ અને $A \operatorname{adj} A = AA^{T}$ હોય,તો $5a + b =$

જો $A = \begin{bmatrix} a & c \\ d & b \end{bmatrix}$ હોય,તો $A^{-1} = $

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} = $ . . . . . . .

જો $A = \begin{bmatrix} 2 & -3 \\ 5 & -7 \end{bmatrix}$ હોય,તો $2A - 3A^{-1} = $

જો ${A^2} - A + I = 0$ હોય,તો ${A^{-1}} = $

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