The value of scalar triple product $i - 2 j + 3 k, 2 i + j - k$ and $j + k$ is

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Detailed Solution

$\begin{array}{l} |\begin{array}{ccc} 1 & - 2 & 3 \\ 2 & 1 & - 1 \\ 0 & 1 & 1 \end{array}| = 1 \times 2 - 2 \times (- 2) + 3 \times 2 \\ = 2 + 4 + 6 = 12 \end{array}$

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