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If A=[[1 ,0 ,1],[0 ,1, 2],[ 0, 0, 4]] ,...

If `A=[[1 ,0 ,1],[0 ,1, 2],[ 0, 0, 4]]` , then show that `|3A|" "=" "27|A|`

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$$ |\mathrm{A}|=\left|\begin{array}{lll} 1 & 0 & 1 \\ 0 & 1 & 2 \\ 0 & 0 & 4 \end{array}\right| $$ Expanding along the first row, ...
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RD SHARMA-DETERMINANTS-Solved Examples And Exercises
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