MCQ
જો$A=\left[ \begin{matrix} \frac{1}{2} & 2 \\ 0 & 2x-3 \\\end{matrix} \right];B=\left[ \begin{matrix} 2 & 4 \\ 0 & -1 \\ \end{matrix} \right]$અને$AB=1$તો$x=......$
- A$2$
- B$-1$
- ✓$1$
- D$0$
$|BA|=|I|$
$|A||B|=1$
$\therefore\frac{1}{2}[2x-3](-2)=1\Rightarrow2x-3=-1$
$\therefore 2x=2$
$x=1$
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