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Question 17.7: i) Work out a × b, where a = 4i + j + 2k and b = 3i - 3k. ii...

i) Work out a × b, where a = 4i + j + 2k and b = 3i – 3k.
\begin{matrix} \text{ii) Confirm that the result is perpendicular to a and b.} & \boxed{\text{write down the minus and work out the determinant} \left|\begin{matrix} 4 & 3 \\ 2 & -3 \end{matrix} \right|} \end{matrix}

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