$A = \left [ \begin{matrix} 7 & x \\ 2 & 10 \end{matrix} \right ] , B = \left [ \begin{matrix} 5 & 6 \\ - 7 & - 9 \end{matrix} \right ]$  

B^-1 = ?

A একটি 4×4 ম্যাট্রিক্স |A|=64 হলে,  $\left \lvert \frac{A}{2} \right \rvert^{- 1}$  =?

$A=\left(\begin{array}{cc}1 & -1 \\ -2 & 3\end{array}\right), B=\left(\begin{array}{ll}1 & -1 \\ 3 & -2\end{array}\right)$

এবং x - y = 1 ও 2x - 3y = 2 একজোড়া সমীকরণ ।

$M=\left[\begin{array}{rrr}2 & 1 & 1 \\ -1 & 2 & 0 \\ 3 & 0 & 1\end{array}\right], X=\left[\begin{array}{l}x \\ y \\ z\end{array}\right]$