यदि $A=\left[\begin{array}{ccc}1 & 2 & 1 \\ -1 & 1 & 3\end{array}\right]$ और $B=\left[\begin{array}{cc}1 & 2 \\ -3 & 1 \\ 0 & 2\end{array}\right]$ है,तो $(AB)^{-1}$ ज्ञात कीजिए।

  • A
    $\left[\begin{array}{cc}5 & -6 \\ -4 & 5\end{array}\right]$
  • B
    $\left[\begin{array}{ll}5 & 6 \\ 4 & 5\end{array}\right]$
  • C
    $\left[\begin{array}{ll}-5 & 6 \\ -4 & 5\end{array}\right]$
  • D
    $\left[\begin{array}{ll}-5 & -6 \\ -4 & -5\end{array}\right]$

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यदि $A = \begin{bmatrix} \cos \theta & -\sin \theta \\ -\sin \theta & -\cos \theta \end{bmatrix}$ है,तो $A^{-1} =$

यदि $\operatorname{adj} B = A$ और $|P| = |Q| = 1$ है, तो $\operatorname{adj}(Q^{-1} B P^{-1}) = $

मान लीजिए $A = \begin{bmatrix} -\cot \theta & \operatorname{cosec} \theta \\ \operatorname{cosec} \theta & -\cot \theta \end{bmatrix}$ है। यदि $\theta = \theta_1$ पर $A^{-1} = A$ और $\theta = \theta_2$ पर $A^{-1} + A = O$ है,तो निम्नलिखित में से कौन सा सत्य है?

यदि $A = \begin{bmatrix} 1 & 3 & 4 \\ 2 & 1 & 2 \\ 5 & 1 & 1 \end{bmatrix}$ है,तो $|\text{adj } A| = $ . . . . . .

आव्यूह $\begin{bmatrix} 0 & 1 & 2 \\ 1 & 2 & 3 \\ 3 & 1 & 1 \end{bmatrix}$ का व्युत्क्रम आव्यूह ज्ञात कीजिए।

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