Problem: Determine x and y if vectors a=[x, y, 1], b=[1, 2, 3] and a x b=[7, -5, 1]. Answer: y=3 x=2 Comments: Please, help is desperately needed.
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Simply multiply it out and solve for each component. For example, looking at the x-component of a x b: $\displaystyle \left| \begin{array}{cc} y & 1 \\ 1 & 2 \end{array} \right| = 7$ $\displaystyle 2y - 1 = 7$ etc. etc.
I don't understand what you mean.
Forget it! I figured it out thanks to your clue. Thanks!
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