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The value of the $\begin{vmatrix}3 & -4 & 5\\1 & 1 & -2\\2 & 3 & 1\end{vmatrix} $ is : |
46 -46 92 -92 |
46 |
The correct answer is Option (1) → 46 $\begin{vmatrix}3 & -4 & 5\\1 & 1 & -2\\2 & 3 & 1\end{vmatrix}$ $=3(1+6)+4(1+4)+5(3-2)$ $=3×7+4×5+5×1$ $=21+20+5$ $=46$ |
