Engineering
Mathematics
Introduction to Determinants
Question
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Solution
\left| {\begin{array}{*{20}{c}}4&x&6\\2&3&4\\1&1&1\end{array}} \right| = 10
we solve this matrix
=>4(3-4)-x(2-4)+6(2-3)=10
=>4\times (-1)-x\times (-2)+6\times (-1)=10
=>-4+2x-6=10
=>2x=10+10
=>x=10
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