Question
$x$ के किस मान के लिए $\left[\begin{array}{lll} 1 & 2 & 1 \end{array}\right] \left[\begin{array}{lll} 1 & 2 & 0 \\ 2 & 0 & 1 \\ 1 & 0 & 2 \end{array}\right] \left[\begin{array}{l} 0 \\ 2 \\ x \end{array}\right]= O $ है?
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